Cities – BLDGBLOG

Potsdamer Sea

[Image: From Kiessling’s Grosser Verkehrs-Plan von Berlin (1920).]

It’s funny to be back in Berlin, a city where I once thought I’d spend the rest of my life, first arriving here as a backpacker in 1998 and temporarily moving in with a woman 14 years older than me, who practiced Kabbalah and had twin dogs and who, when seeing that I had bought myself a portable typewriter because I was going through a William Burroughs phase, blessed it one night in her apartment near the synagogue in a ceremony with some sort of bronze sword. It’s almost literally unbelievable how long ago that was. More years have passed since I spent time in Berlin—supposedly to study German for grad school, but in reality organized entirely around going to Tresor—than I had been alive at the time.

Because I’m here again on a reporting trip, I was speaking yesterday evening with a former geophysicist who, when the Berlin Wall came down, found work doing site-remediation studies and heritage-mapping projects on land beneath the old path of the Wall. He was tasked with looking for environmental damage and unexploded ordnance, but also for older foundations and lost buildings, earlier versions of Berlin that might pose a structural threat to the city’s future or that needed to be recorded for cultural posterity.

Ironically, in a phase of my life I rarely think about, I wrote my graduate thesis on almost exactly this topic, focused specifically on Potsdamer Platz—once divided by the Wall—and the role of architectural drawings in communicating historical context. When I was first here, in 1998 into early 1999, Potsdamer Platz was still a titanic hole in the ground, an abyss flooded with groundwater, melted snow, and rain, a kind of maelström you could walk over on pedestrian bridges, where engineering firms were busy stabilizing the earth for what would become today’s corporate office parks.

As I told the former geophysicist last night, I remember hearing at the time that there were people down there, SCUBA diving in the floodwaters, performing geotechnical studies or welding rebar or looking for WWII bombs, I had no idea, but, whatever it was, their very existence took on an outsized imaginative role in my experience of the city. Berlin, destroyed by war, divided by architecture, where people SCUBA dive through an artificial sea at its broken center. It felt like a mandala, a cosmic diagram, with this inverted Mt. Meru at its heart, not an infinite mountain but a bottomless pit.

What was so interesting to me about Berlin at the time was that it felt like a triple-exposure photograph, the city’s future overlaid atop everything else in a Piranesian haze of unbuilt architecture, whole neighborhoods yet to be constructed, everything still possible, out of focus somehow. It was incoherent in an exhilaratingly literal sense. In Potsdamer Platz, what you thought was the surface of the Earth was actually a bridge; you were not standing on the Earth at all, or at least not on earth. It was the Anthropocene in miniature, a kind of masquerade, architecture pretending to be geology.

The more that was built, however, the more Berlin seemed to lose this inchoate appeal. The only people with the power to control the rebuilding process seemed to be automobile consortiums and international hotel groups, office-strategy consultants not wizards and ghosts or backpacking writers. Perhaps the city still feels like that to other people now—unfinished, splintered, jagged in a temporal sense, excitingly so, a city with its future still taking shape in the waves of an underground sea—but it seems to me that Berlin’s blur has been misfocused.

In any case, with the caveat that I am in Berlin this week for a very specific research project, so many people I’ve met have pointed to the fall of the Wall as an explosive moment for geophysical surveys in the East. Engineers were hired by the dozen to map, scan, and survey damaged ground left behind by a collapsed imperialist Empire, and the residues of history, its chemical spills and lost foundations, its military bunkers and archaeological remains, needed to be recorded. The ground itself was a subject of study, an historical medium. On top of that, new freeways were being built and expanded, heading east into Poland—and this, too, required geophysical surveys. The future of the region was, briefly, accessible only after looking down. The gateway to the future was terrestrial, a question of gravel and sand, forgotten basements and fallen walls.

The SCUBA divers of the Potsdamer Sea now feel like mascots of that time, dream figures submerged in the waves of a future their work enabled, swimming through historical murk with limited visibility and, air tanks draining, limited time. Their pit was soon filled, the hole annihilated, and the surface of the Earth—which was actually architecture—returned with amnesia.

My True Love Gave to Me…

[Image: U.S. Army soldiers “provide security while clearing an underground complex during dense urban environment training,” photo by Captain Scott Kuhn.]

I had missed this “urban warfare Christmas wish list” posted back in 2018, complete with specific but speculative tools for intra-architectural combat. Who doesn’t think about urban warfare on Christmas?

The list suggests developing a military-grade “industrial foam thrower” (perhaps suggesting a future black-market for used rave equipment). “I want an industrial foam-throwing gun,” John Spencer writes, “that will seal each opening as I find and move past them. Foam is already used to lift concrete house foundations, streets, and sidewalks in the private sector. Adapting this tool to the needs of the urban warrior would pay huge dividends.”

Spencer’s wish list continues: “I would want a mining robot that could drill or punch holes in walls in advance of my movements. The robot would have the software, data, and sensing capability to know where to go through walls most easily and with the least amount of damage.”

In fact, this gives me the perfect excuse to post something I’ve had bookmarked for years: remote controlled demolition robots. Husqvarna, for example, makes “a small and very versatile demolition robot that can be transported inside a van.” Surely, a militarized line of portable, remotely controlled demolition robots is just one purchase-order away from becoming reality.

The list continues. Spencer calls for wheeled barriers, allowing “concrete walls to roll directly off of a flatbed truck into position”; giant, grenade-launcher-deployed curtains for blocking entire streets and buildings from view (what he has elsewhere referred to as “an invisibility kit for urban combat”); and, among other things, military-grade jumper cables for tapping into the batteries of ruined cars left junked out on the street in order to power a unit’s portable electronic gear.

[Image: From Tenet, courtesy Warner Brothers.]

Spencer also hosts a podcast called the “Urban Warfare Project,” one episode of which adds another, somewhat Tenet-like piece of gear to this list: air tanks for prolonged missions in underground spaces. (In Christopher Nolan’s recent film, Tenet, the characters need to wear air tanks so that they can breathe while moving back in time.)

In any case, as I write in A Burglar’s Guide to the City, one of the reasons for studying these sorts of tools—whether they are military or criminal, whether they are used by firefighters or by demolition crews—is to understand both how works of architecture are internally connected and how those same structures can be dismantled.

Indeed, nearly every tool on Spencer’s list would also be of use for a sufficiently ambitious burglary crew—firing curtains across the street to hide entry and exit points, using demolition machines to break into vaults—but whether you pay attention to this stuff purely as an academic exercise or as a spur toward designing works of architecture that can resist, confuse, or baffle such equipment is up to you.

Check out the rest of Spencer’s list over at the Modern War Institute.

(Very vaguely related: Nakatomi Space.)

Illumination and Vertigo

[Image: From Glow by Michael Light].

Angelenos, if you’re downtown tomorrow evening, Thursday, August 15th, consider stopping by the Mark Taper Auditorium at the Los Angeles Public Library to hear photographer Michael Light discuss his recent aerial work. I’ll be joining him for a public conversation about the photographs, moderated by curator Claudia Bohn-Spector.

The event accompanies an ongoing exhibition of Light’s work called Glow: Michael Light’s Aerial Views of Los Angeles. That explores “themes of mapping, vertigo, human impact on the land, and various aspects of geologic time and the sublime,” and it is open until September 8th.

Several years ago, my wife and I interviewed Light at great length about everything from wreck-diving nuclear testing sites in the Pacific to flying over huge geometric landforms in unbuilt suburbs near Las Vegas, so that’s perhaps a good place to start if you’d like to learn more about his work.

If you make it out tomorrow, say hello! The event starts at 6:30pm. Here is a map.

The Atlas of Natural Regions

[Image: “Saint-Valentin, Champagne berrichonne (Centre-Val-de-Loire), 2019, by Eric Tabuchi].

I’ve been enjoying the Instagram account of photographer Eric Tabuchi for quite a while now. Tabuchi is working on an ambitious ten-year photographic project, kicked off in 2017, that he calls The Atlas of Natural Regions, basically a catalog of spatial conditions found throughout France.

The project “aims to create a photographic archive offering a broad overview of the diversity of the buildings, but also the landscapes, that make up the French territory,” Tabuchi explains. “Ultimately, 50 shots will be taken in each of France’s natural regions, geographical and cultural entities that are simple to grasp by their size (a few tens of kilometers).”

It will include 25,000 photographs when it’s done—and I am already excited to see the final exhibition or book when it’s complete. So far, there have been flooded quarries, sports complexes, and emergency training towers, industrial ruins, coastal bunkers, and surreal scenes that resemble something designed by Simon Stålenhag.

Tabuchi’s Instagram account is well worth following, and you can also support his work by purchasing a print.

Feral Cities, Indirect Streets, and Soft Fortification

[Image: “Thomas de Leu, engraver. Perspective view of an ideal city, 1602. From Jacques Perret, Architectura et perspectiva des fortifications & artifices de laques Perret. Courtesy CCA].

[Nearly a decade ago, I wrote a series of blog posts as part of a Fellowship at the Canadian Centre for Architecture. Those posts appear to be falling into an internet memory hole, so I thought I’d reproduce lightly edited versions of some of them here, simply for posterity.]

In 1564, the Tuscan urban planner, archaeologist, military theorist, mathematician, and writer Girolamo Maggi published a work of military urbanism called Della fortificatione delle città, written by his colleague Giacomo Fusto Castriotto.

That work, on the fortification of cities, devoted several passages to what might be called indirect or soft fortification: protecting an urban population from attack not through the use of heavy walls, inner citadels, or armed bastions—although the book is, of course, filled with such things—but through nothing more than a complex street plan.

Indirect streets and narrow walkways could be put to use, Castriotto argued, as agents of spatial disorientation, leading an invader everywhere but where they actually wanted to go. It was a kind of urban judo, or the city as martial art.

The city itself could be weaponized, in other words, its layout made militarily strategic: you could transform the speed at which your enemy arrives into exactly what would entrap him, lost, unable to retrace his footsteps, fatally vulnerable and spatially exposed.

The CCA exhibited much of its collected manuscripts on urban fortification seventeen years ago, under the name The Geometry of Defence: Fortification Treatises and Manuals, 1500–1800.

In the accompanying pamphlet, curator and former CCA historiographer Michael J. Lewis describes the geometric complexification that the fortified cities of the Renaissance underwent in the name of self-protection (Alberto Pérez-Gómez’s Architecture and the Crisis of Modern Science also contains a lengthy history of this same material and is worth consulting in full). A constantly shifting imbalance of power between the wall-builders and the invaders led to new spatializations of the metropolis. Whether due to the invention of gunpowder, massed assaults or simply new building techniques, the urban landscape was constantly reformatted according to the weapons that might be used against it.

Of course, this will be a very familiar story to most readers, so I don’t want to repeat it; I do, however, want to focus on the idea of forsaking mass—thick walls—for complexity in the name of strategic disorientation. There are well-known stories, for instance, of English coastal villages during World War II removing their road and street signs so as to prevent logical navigation by German aggressors, even erecting dummy signs to send confused Nazi paratroopers wandering off in the wrong direction.

But if the well-fortified Renaissance city could be seen, for the sake of argument, as something like the Hummer of military urbanism, what is the city-as-Bruce-Lee? A city that is lean, even physically underwhelming, but brilliantly fast and highly flexible? What is the city that needs no defensive walls at all?

[Image: “Unknown engraver. Series of views showing the development of the modern bastion system from its medieval origins. Plate A from Matthias Dögen, Matthiae Dögen Dramburgensis marchici Architectura militaris moderna, 1st ed. (Amsterdam, Ludovic Elzevir, 1647).” Courtesy CCA].

There are a variety of possible answers here, all of which would be interesting to discuss; but I’m most struck by the possibility that the phenomenon recently dubbed the “feral city” is, in a sense, an anti-fortress in precisely this spatial sense.

In a now-canonical 2003 paper for the Naval War College Review, author Richard J. Norton describes the feral city as “a great metropolis covering hundreds of square miles. Once a vital component in a national economy, this sprawling urban environment is now a vast collection of blighted buildings, an immense petri dish of both ancient and new diseases, a territory where the rule of law has long been replaced by near anarchy in which the only security available is that which is attained through brute power.”

From the perspective of a war planner or soldier, Norton explains, the feral city is spatially impenetrable; it is a maze resistant to aerial mapping and far too dangerous to explore on foot. Indeed, its “buildings, other structures, and subterranean spaces would offer nearly perfect protection from overhead sensors, whether satellites or unmanned aerial vehicles,” Norton writes, creating, in the process, an environment where soldiers are as likely to die from rabies, tetanus, and wild dog attacks as they are from armed combat.

I’m led to wonder here what a twenty-first-century defensive literature of the feral city might look like—from temporary barricades to cartographically incoherent slums experimenting with limited forms of micro-sovereignty. If the feral city is a city with no external walls but an infinite interior—endless spaces made of oblique architecture and indirect streets—then its ability to defend itself comes precisely through letting invaders in and fatally disorienting them, not by keeping them out.

So if a city does away with defensive walls altogether, what specific spatial strategies are left for it to protect itself? For instance, can a city deliberately be made feral as an act of preemptive self-defense—and, if so, what architectural steps would be necessary to achieve such a thing? Channeling Archigram—or perhaps even Cisco—we might call this the insurgent instant city complete with its own infrastructural practices, its own rogue designers, and its own anti-architects.

How, then, could the spatial practice of urban feralization be codified, and what architectural lessons might be learned if this were to happen?

Michael J. Lewis, describing the treatises on display at the CCA nearly two decades ago for The Geometry of Defence, refers to “fortification literature” or “the literature of the fortification,” including the publishing practices peculiar to this—for its time—top secret field of study. For example, privately circulated manuscripts, incomplete essayistic reflections, and even word-of-mouth gradually solidified into full-length narratives; only at that point were they intended to communicate finely tuned, often firsthand, military knowledge of a city under siege to anyone who might want to discover it, whether that was a king, a layperson, or an enemy general (indeed, much of the literature of fortification went on to the form the core of an emergent field known as urban planning).

In another fifty, one hundred, or even five hundred years, will there be a defensive literature of the feral city, its systematic description, techniques for its defense (or obliteration), and its urban logic (or lack thereof)? Even if only on the level of urban form, this would be a fascinating journey, going from Castriotto’s and Maggi’s indirect streets to whole cities gone wild in the name of resisting outside intervention.

Metropolitan Accomplice

[Image: Photo by Jonas Roosens/AFP/Getty Images, courtesy of the Guardian].

You might have seen the news that a crew of burglars used sewer tunnels beneath the diamond district in Antwerp, Belgium, to break into a nearby bank vault.

“Detectives in Antwerp are searching for clues in a sewage pipe under the Belgian city’s diamond quarter after burglars apparently crawled through it to break into a bank holding safe deposit boxes full of jewels,” the Guardian reported.

The heist allegedly began across the street, in a separate building, where they dug into the sewer network; one of the city’s many subterranean pipes led close enough to the bank that the crew could then tunnel just a few more meters to make entrance.

A couple of details stand out. For example, the police apparently had to hang back long enough to take gas measurements above the newly opened sewer tunnel, fearing either that the air quality would be so bad that they could risk asphyxiation or that the sewer emanations themselves might be explosive.

Either way, this suggests a possible strategic move by future burglars, who night now know that police—or, at the very least, police not equipped with gas masks—will be delayed due to chemical concerns. Infrastructural off-gassing could become a kind of criminal camouflage.

The other detail is simply that, when the police began investigating the crime, “The first the residents of the central Antwerp district knew of the incident was when police raised all the manhole covers running down the centre of Nerviërsstraat,” the Guardian reported. This otherwise inexplicable sight—law enforcement officers suddenly raising the lid on the city’s underworld—was actually part of a forensic investigation.

I’ve already written at length about tunnel jobs used in bank heists—including a still-unsolved crime from Los Angeles, back in the 1980s—in my book, A Burglar’s Guide to the City, so I will defer to that book in terms of addressing specific aspects of underground crime. In fact, I would perhaps even more specifically recommend the book Flawless by Scott Selby and Greg Campbell, about another, massive heist in Antwerp’s diamond district pulled off in 2003.

[Images: Sewer maps and diagrams are now freely available online; the ones seen here are from Los Angeles and detail the same neighborhood in which a 1986 bank heist occurred, where the bandits tunneled into a vault using the city’s stormwater network. Read more in A Burglar’s Guide to the City or in retired FBI agent Bill Rehder’s absurdly enjoyable memoir, Where The Money Is].

Instead, what seems worth commenting on here is simply the very nature of urban infrastructure and the ease with which it can be repurposed for designing, planning, and committing crimes. The city itself can be an accomplice in acts entirely unrelated to the infrastructure in question. A freeway route enables a bank-heist getaway, a sewer tunnel offers jewel thieves a subterranean method of entry, a specific intersection’s geometric complexity means that carjackings are more likely to occur there: the city is filled with silent accomplices to future criminal activity, activities and events unforeseen by most city planners.

Will this intersection lead to more carjackings? is unlikely to be high on the list of questions posed by community feedback, yet it’s exactly that sort of tactical thinking that might allow designers to stay one step ahead of the criminals who seek to abuse those same designers’ finished projects.

(Thanks to Nicola Twilley for the tip!)

Architecture of the In-Between

“The city owns some of the narrowest, most unusual lots in New York,” we read, but these odd lots might soon host affordable housing. A new competition called Big Ideas for Small Lots NYC is looking for architectural proposals for how these awkwardly sized spaces might be used.

Although these overlooked lots exist all over New York—“The city became the owner of thousands of properties beginning in the 1960s and ’70s,” The New York Times explains, “many in the Bronx and Brooklyn, where properties were seized from delinquent landlords and urban blight was rampant”—the competition is focused on one particular location:

Entrants will be asked to focus on a property on West 136th Street in Harlem, a 17-foot-wide, 1,665-square-foot mid-block lot that is overgrown with weeds and home to a number of feral cats. It was chosen because many of its challenges, including narrow frontage and limited sunlight, are present at other lots on the list, according to a spokesman for the project.

Read more at the project website or at The New York Times.

(Very, very vaguely related: Buy a Los Angeles Sidewalk Corner).

The City’s Secret Ink

A short article up at The New Yorker follows the adventures of so-called “ink enthusiasts” as they seek new sources of pigment in New York City.

[Image: Via Flickr].

The author, Amy Goldwasser, tags along as the group wanders on “a five-hour foraging trip that would take them up to Hudson Heights, to collect foliage and trash, which they would cook, to make ink.”

By the time the foragers left Central Park, the pockets of [tour leader] Logan’s jacket were already bleeding pink. After finishing uptown, a few hours later, they went to [a participant’s] apartment, to make ink. One batch was pure pokeberry juice (vivid magenta). Another included five varieties of acorn boiled with rust from various sources—nuts and bolts, wire, brackets—and a drop of gum arabic. It came out a complicated silver-gray. Logan spread a range of ink pots on [the participant’s] kitchen table. He dipped the bottom of a glass jar into the rust-and-acorn ink and pressed it onto a piece of paper, making a silvery circle. “Look at our day,” he said. “Now, that, to me, is the blood of New York.”

The city’s capacity to leave marks—to stain, print, and tattoo the things and people that pass through it—can be found in the most mundane items, secret ink hidden inside “acorns, wild grapevines, beer caps, feathers, subway soot.”

Governor General of Fortifications

[Image: From Michelangelo: Divine Draftsman and Designer, by Carmen C. Bambach].

As part of some tangential research for an article of mine coming out this weekend, I found myself looking at Michelangelo’s incredible sketches for fortifications and defensive works designed for the city of Florence.

Michelangelo served as “Governor General of Fortifications” for this massive military project, undertaken in the late 1520s to protect the city from an eventual 11-month siege.

[Image: From Michelangelo: Divine Draftsman and Designer, by Carmen C. Bambach].

While Michelangelo’s walls play only the most marginal role in the actual article I was writing, I was so taken by the images that I thought I’d post a few here. Graphically bold and interestingly layered with other sketches and drawings, they’re surprisingly beautiful.

Indeed, as the late Lebbeus Woods wrote, “For all their practical purpose, these drawings have uncommon aesthetic power.”

[Image: Michelangelo’s sketches for the fortification of Florence].

This wouldn’t be surprising. In a paper called “‘Dal disegno allo spazio’: Michelangelo’s Drawings for the Fortifications of Florence,” historian William E. Wallace points out that, “In the Renaissance, military engineering was an important aspect of the profession of being an artist.”

Designing defensive works to protect his own city from attack was thus a natural continuation of Michelangelo’s expertise, and his artistic sensibility only made the resulting designs that much more visually captivating.

[Image: Michelangelo’s sketches for the fortification of Florence].

The vocabulary for these structures is also, in its own way, strangely mesmerizing.

As Wallace writes, for example, this is “a design for an extremely complex detached bastion, a triangular-shaped defensive work usually projecting from a rampart or curtain wall, but here situated in front of a rectangular city gate which is drawn toward the bottom center of the sheet. The fortification is actually composed of three separate outworks or lunettes, and two ravelins, the long narrow constructions placed in front of the defensive work in order to break up a frontal assault. The various parts of the fortification are linked by removable log or plank bridges, and the whole complex is surrounded by a ditch repeatedly labeled ‘fosso,’ the outer rim of which, the counterscarp, has a stellate outline echoing the pincerlike (tenaille) form of the fortification.”

Bastions, counterscarps, outworks, lunettes. Ramparts, ravelins, stellate outlines.

[Image: Michelangelo’s sketches for the fortification of Florence].

In any case, you can see more over at Lebbeus Woods’s site, or in Carmen C. Bambach’s gorgeously produced exhibition catalog, Michelangelo: Divine Draftsman and Designer.

(Related: The City and its Citadels. Thanks to Allison Meier for helping obtain a copy of William E. Wallace’s paper.)

Thermal Crime Wave

[Image: From FBI surveillance video in Baltimore].

One interesting side-effect of ever-intensifying heatwaves in an era of global climate change might be that infrared imaging technology used by the police is no longer quite as effective. Human bodies will be cooler than the surrounding landscape, meaning that they could simply disappear from view.

It’s like that scene in The Thomas Crown Affair where a portable heater, hidden inside a briefcase, incapacitates an infrared surveillance camera at the Metropolitan Museum of Art—only, here, it’s been scaled up to an entire metropolis. Heat the city; disappear.

This is, of course, a solved problem—forward-looking infrared (FLIR) cameras can be adjusted to accommodate different temperature ranges. Nonetheless, it’s intriguing to imagine a fictional future crime wave timed specifically and deliberately for a night of excruciatingly hot temperatures in a city somewhere, the bodies of criminals mischievously blending in with the buildings around them as they only rob buildings close to their own thermal range. Criminals armed with precision thermometers, casing the city.

That, or they can simply wear graphene.

(Thanks to @raihan_ for the heads up; also, I wrote fairly extensively about police FLIR use in A Burglar’s Guide to the City.)

La vie minérale

[Image: Photo by Virginie Laganière and Jean-Maxime Dufresne].

A new exhibition featuring photos, videos, and sound installations by Virginie Laganière and Jean-Maxime Dufresne looks at life underground in Helsinki, Finland.

“Imagine a city with more than 400 underground facilities, tunnels that span over hundreds of kilometres and 10 million cubic meters of space carved into old Precambrian bedrock,” they write. These spaces serve as “athletic training sites, energy distribution networks, globalized data centers, archival chambers, a buried church or undisclosed military facilities,” to name only a few of their everyday uses.

The exhibition is up until June 17th, in Québec City. Read more at l’Œil de Poisson.