Tag Archives: information technology

Leon Krier’s lesson in architecture

Review of The Architecture of Community – Léon Krier (2009), Island Press

The Amazon Santa visited me this year and left Léon Krier’s latest, and likely ultimate, publication, The Architecture of Community. (Thanks to those who made generous purchases on the Emergent Urbanism Amazon Store, remember that you can also purchase anything at all.)

Back in the 1970’s when architectural modernism began to fall apart or be outright demolished, the architectural intelligentsia decided that it was okay to start using ornament again, to make buildings flashy, to take the dry structures of modern buildings and decorate them with absurd icons whose purpose was to entertain long enough that no one would notice that the architecture was still terrible. Léon Krier, a renegade amongst renegades who had no formal architectural education, had an other idea in mind: that there was such a thing as objective laws in architecture, that these laws remained unchanged over time, and that classicism was the best expression of these laws. Any other architect’s career would be destroyed by such a claim in such an era – Léon Krier just kept going, publishing article after article, book after book, until the estate of the Prince of Wales gave him his big break and commissioned the design of an entire neighborhood based upon his ideas. If there is a neo-traditionalist movement in architecture and urban design today, it is because Léon Krier imagined it first. This book is the compilation of the product of his career as an architect, but mostly as a writer.

Having read through the book, my conclusion is that Krier gives a thorough lesson in architecture, taking obvious pleasure is shredding the myths of modernism to pieces and exposing its false prophecies. However, the text never goes beyond the most superficially descriptive, often involving comparisons and an appeal to common sense. While Krier can point out, using his trademark caricatures, how absurd the patterns of modern sprawl are, he has no explanation as to why such patterns would exist, except that it may be just one big conspiracy. He has even less to say about community, which is strange considering the word is in the title. It is as if in the vocabulary of neo-traditional architects community and space have become synonymous. (Many of the great villages and towns of Europe are dying because their community is dying, regardless of their physical form.) For this reason Krier produces a very sharp lesson in architecture, but provides no insight into morphology, and cannot really develop a model of urbanism that isn’t simply architecture at enormous scale. It should be no surprise that his disciples have practiced town planning the same way.

Despite his claims of providing a plan for the post-fossil fuel age, his projects require enormous concentrations of capital to develop, the kind of capital only princes have at their disposal, and provide no guarantee of ever being home to a true community. Although he demonstrates a sensibility, if not necessarily an understanding, for chaos theory and complexity, I am left wondering if he refers to it because he finds it convenient, or because it is true. He points out that fractal geometry has denied modernism the use of abstract forms as more rational geometric objects, and many of his drawings could be used as perfect examples of complex geometry. It is however not explained why anything is depicted the way it is, or how it could be the way it is. Architectural complexity is embraced, but the leap to emergence, crucial for any practical model of urbanism, is not there.

Most of the book consists of sketches, pictures and small essays whose intent is to persuade instead of to argue, and there lies the most peculiar thing about it. It is in precisely the same format that Le Corbusier once published his works of pioneering architectural propaganda. It is as if Krier sought to turn the very arms of modernism against it, to fight evil with evil with a classical counter-propaganda. Krier knows the power that architecture can wield – his monograph on the architecture of Albert Speer (Albert Speer: Architecture, 1932-1942) remains one of the most frightening architectural books I’ve yet seen, if there can be such a thing as a frightening architecture. He exposed fascism in all of its most seductive displays, at once explaining how the movement could wield power over so many followers, and why there would be a ban against classical architecture itself in the aftermath of the war. One could read hundreds of post-war philosophers without ever arriving at such a realization. Krier believes that classical architecture is a powerful cultural force that can also be used for good, that it is absurd to deny ourself this force because it was used to evil ends, and concludes as such his review of Speer. There is nothing so epic in this new book, although Krier dedicates an entire chapter to a plan for Washington D.C. that would “complete” the city (a plan he also displays on the cover), which shows us where his loyalties lie. What he doesn’t seem to know is how dangerous the power of propaganda is, and how using it may be feeding the very process he wants to denounce.

Hence, the most problematic issue with this compendium of Krier’s career is the medium itself. Krier presents drawings of an architecture that is rationalized and purified, playing it safe in order to rebuild architecture on its foundations. The great eclectic architecture of the 19th century, and the early 20th, is left out. That does not demonstrate confidence in one’s belief in laws of architecture, and will not provide anything greater to a new generation of architects than an alternative propaganda that may tap some deeper feeling, but won’t give them any arguments against other fashions that violate the laws. It also won’t give them the confidence to radically apply the laws in order to invent architectural patterns that meet the needs of today’s society, whatever you want to call it. (Post-post-modern? Ultra-modern? Webbed?) Krier may not have realized that modern architecture is a product of such propaganda, the result of architecture no longer being practiced by artisans for the benefit of their local community, but by writers and graphic designers trying to come up with the flashiest image they can place in a magazine. The quality of the building is irrelevant if the magazines drive your business.

Much like the medium created modern architecture, the medium also created medieval and neo-classical architecture. The information technologies of Gothic churches were primitive, but extremely complex. Neo-classicism could use printing, and that made mass propagation of patterns possible to the extent that these patterns were translated into drawings. The revival of the laws of architecture that Léon Krier dreams of will likely need a new medium, one that is characteristic of our society, to be accepted as evident. Until that is invented, Krier has done us all a great service by destroying the temple of modernism, leaving at least a clean slate and the right principles to start over.

Decoding paradise – the emergent form of Mediterranean towns


Serifos in Greece

Until very recent times, a study entitled Julian of Ascalon’s Treatise of Design and Construction Rules From Sixth-Century Palestine might have been categorized somewhere in-between ancient history and archeology of architecture, if not relegated to the dusty shelves of legal scholarship. Although it deals with one of the most sought-after secrets of architecture, how to build the charming Mediterranean towns of Greece, Spain, North Africa, the Near East and many other places, this is not immediately obvious from the content of the treatise. The reason for this is that the treatise does not so much describe the form of the town as the process for building it, and the process turns out to be emergent. Unless the reader makes the link from process to form, the rules described will make no more sense than the rules for a cellular automaton out of context.

It is tragic that enormous amounts of resources have been spent attempting to recreate the Mediterranean town with no clue as to the underlying source of its complexity. Montreal itself has the world famous Habitat 67, a confusing pastiche of the memories that architect Moshe Safdie brought back from his land of birth, which he had in common with Julian of Ascalon. Habitat 67 was intended to be a low-cost solution to housing, but it never was taken seriously as a model for urban habitat, and its current untrendiness spares it from being labeled fake complexity. That an attempt to emulate the architecture of some of the poorest people of previous centuries would result in an expensive failure testifies to the inadequacy of modern production processes, but also of the wealth inherent in those simple traditional production processes. The beauty resulting from large aggregations of simple buildings has turned many towns into tourist destinations. There is value in process.

The complexity demonstrated by the constructions of pre-modern civilizations may be a direct consequence of their material poverty. Most people will claim that the loss of building quality is a result of culture, and so we must change our own culture through education. That is not a complete answer. Cultures are stored in information technologies and media. The modern era coincides with the invention of printing, making it possible for the first time to reproduce information in large quantities at low costs. As information technologies have progressed and become more affordable, building processes have become increasingly dependent on large amounts of descriptive information, with blueprints describing in every minute detail how to compose a building. And now that CAD software can describe and store nearly limitless information, whole new forms of buildings have become possible.

All of this progress has only enabled builders to become lazier with information. Pre-modern builders, limited to oral communication and their brains to hold information, had to employ very sophisticated means of information compression to communicate and simply remember their cultures. This lead them to rely on simple processes the likes of which are behind the complexity in fractal geometry and cellular automata to build their environments – very short sequences of information that can be utilized to generate fully complex forms. Christopher Alexander even used as an example, in The Nature of Order, the production of a boat that had been coded into a song that the builders recited while creating the boat, adding a mnemotechnical aspect to the storage of cultural information that was essential to pre-modern survival.

Without knowing how traditional cultures were stored, we had no idea how to inspire ourselves from them. Modern and post-modern architects attempted in vain to imitate traditional building using their own, lazy information technologies, and succeeded only in building pastiche of complexity. The breakthroughs in complexity theory of the past decades finally gave us the opportunity to decode the mysteries of historic building cultures by showing us what kind of information to search for. What was right in front our noses suddenly becomes deeply meaningful.

It is to his great credit that Besim S. Hakim went looking specifically for the source of the emergent forms of Mediterranean towns in treatises of building laws. From his study of the treatise of Julian of Ascalon, but also of those of Muslim scholars around the Mediterranean, he was able to identify the underlying process that generates the complex morphology all towns of the region have in common, and that so many have sought to imitate. It is no exaggeration to call this pioneering work in complexity.

The space of Hakim’s search began in the Islamic world, with the treatise of Ibn al-Rami from Tunis in circa 1350. Tracing the origins of the practices described in the treatise, references to treatises written in Egypt, Arabia, Tunisia and Andalusia in previous centuries were researched until the treatise of Julian of Ascalon was uncovered. Written in Palestine to describe the local building customs in order to provide the Byzantine empire with an improved legal system, this particular treatise’s value is its longevity. After propagating throughout Greek civilization as part of a general book of laws (the Hexabiblos), its authority was invoked in decisions dating as recently as the 19th century. Hakim infers the origins of these shared practices, and the shared morphology of regions as far apart culturally, linguistically and geographically, as Andalusia, Greece and Palestine, to customs from ancient Babylonian civilization that had spread to the Eastern Roman Empire.

The goal shared by these treatises is a definition of urbanism as relevant today as it was in Babylon:

The goal is to deal with change in the built environment by ensuring that minimum damage occurs to preexisting structures and their owners, through stipulating fairness in the distribution of rights and responsibilities among various parties, particularly those who are proximate to each other. This ultimately will ensure the equitable equilibrium of the built environment during the process of change and growth. (Hakim, Mediterranean urban and building codes: origins, content, impact, and lessons, p. 24)

Here we see what the underlying error of Habitat 67 was. It was designed as a single static building imitating a process that made a living tissue out of many individual acts of simple building. The codes of the Mediterranean treat the town as a living, whole structure in movement that must be preserved while it achieves equilibrium with a changing environment and society.

Perhaps the most relevant conclusion of this research is the identification of proscriptive and prescriptive rules for building.

Proscription is an imposed restraint synonymous with prohibition as in ‘Thou shalt not’, for example, you are free to design and manipulate your property provided you do not create damage on adjacent properties. Prescription is laying down of authoritative directions as in ‘Thou shalt’, for example, you shall setback from your front boundary by (x) meters, and from your side boundaries by (y) meters regardless of site conditions. Byzantine codes in many instances included specific numeric prescriptions, unlike their Islamic counterparts that tended not to include them. (Hakim, Mediterranean urban and building codes: origins, content, impact, and lessons, p. 26)

A prescription would be a rule that defines in detail what to do in a given situation. A proscription is a template for defining prescriptive rules, a pattern for a rule. Muslim scholars provided mainly proscriptions, but Julian of Ascalon’s treatise was highly prescriptive. Julian was describing in details the local building codes with the idea that they would be used to devise proscriptive rules for the empire. By accident these prescriptive rules became law and remained in force for centuries until their inability to deal with society or physical conditions radically different from sixth century Palestine made them obsolete. Although it means the codes failed to deal with changing circumstances, this gives us the chance to bridge the gap between the physical structure of built towns and the rules that generate them.

The concept of proscriptive rules also helps explain why so many different cultures with specific structural typologies can generate such similar morphology. Hakim uses as an example the problem of views. The Greeks were preoccupied with views of the sea, and their prescriptive rules obliged the preservation of view corridors in new constructions. Muslims, on the other hand, were preoccupied with the preservation of privacy and the prevention of intrusive views from one property to another. This would have very different results structurally, however those two prescriptive rules are based on the same underlying proscription. Local customs and culture could therefore be translated into prescriptive rules using the proscriptions inscribed in building treatises and the emergent morphology of those proscriptions would be symmetric from one culture to the next, while being fully adapted to local conditions.

Another significant fact that strikes out from these treatises is the importance of relationships between neighbors. The Julian of Ascalon treatise describes how to literally embed houses into each other, ultimately making them one continuous, somewhat random building created through iterated steps. But most importantly by proscribing rules as relevant to a neighborhood, Mediterranean urbanism avoids the problem of the absolutist, dare I say “Cartesian” rules of modern planning that are relative to the precisely subdivided lot the building is on. Hakim shows the wastefulness of latter rules in a comparison of the old town of Muharraq in Bahrain with a new subdivision from modern Muharraq.

hakim1a hakim1b

The town on the left was generated using proscriptions based on neighbors, while the subdivision on the right used absolute rules planned with the subdivision. Notice that the configurations on the right waste much of the space in order to achieve a strictly Cartesian, grid-like morphology that no doubt looks orderly to the planners.

The last item of significance, and perhaps the most revolutionary, is how the proscriptions extracted by Hakim are similar in nature to the rules that Stephen Wolfram described to generate emergent complexity with cellular automata. He himself follows a proscription/prescription system, where the proscription is for example the 2 color, one-dimension elementary cellular automaton that made him famous, for which there exist 256 different prescriptive rules of neighborhood, some of which grow in time to make two-dimensional chaotic fractals. Some urban complexity researchers such as Michael Batty have been playing with cellular automata trying to reproduce urban form, but their efforts have taken them on the wrong track. The codes of historic towns behave in the same manner as a cellular automaton. This should be the focus of their research.

Whatever the potential for research, the proscriptions discovered by Besim S. Hakim are still relevant today and can be used to create the prescriptions that we need to implement an emergent urbanism relevant to the problems of today, that is to say the creation of a sustainable city and living urban tissue out of the vast urban fabric of suburban sprawl. Hakim has so far focused his work on the regeneration of historic neighborhoods by restoring the generative codes that produced them, but there is a vast potential to expand his work to non-historic neighborhoods that are in dire need of new life.


Four regions, four cultures, one shared process generating a symmetric morphology










Besim S. Hakim – Generative processes for revitalising historic towns or heritage districts

Besim S. Hakim – Julian of Ascalon’s Treatise of Construction and Design Rules from Sixth Century Palestine

Besim S. Hakim – Mediterranean urban and building codes: origins, content, impact, and lessons

and don’t forget to look at Besim S. Hakim’s website.

Mr. Besim S. Hakim provided comments for this article

Picture from Alessandra Scarano were also used