Muqarnas (2019-)

Muqarnas - elaborate ornamental vaultings - are some of the earliest and most impressive examples of a rule-based architectural design. They combine architecture, mathematics, and art to form highly intricate and complex stalactite structures. The beauty of these abstract, non-figurative formations has fascinated people throughout history.

Today, advances in computational design and digital fabrication invite us to revisit these typologies. How can computation and robotic fabrication bring the splendor of such a rule-based geometric art into the future? Can the computer help us to explore new and unseen muqarna formations? In this project, the computer becomes a tool for search and exploration, a partner in our quest for the hitherto unseen. It allows us to create objects of exceptional breadth and depth: endless permutations of designs with a richness of detail that can once again evoke marvel, curiosity and bewilderment.

Historical Archetypes

Muqarnas originated in the 11th century under the Seljuk dynasty, initially serving as structural transitions between the square base of a building and the circular foundation of its dome. Composed of stacked, overlapping horizontal layers, these elements gradually evolved from purely functional supports into intricate sculptural forms. Over time, the connections between layers became more articulated, giving rise to an elaborate ornamental system that transcended structural necessity.

By the peak of their development, muqarnas had become a hallmark of Islamic architecture, adorning the interiors and portals of mosques, madrasas, shrines, and palaces. Their thousands of meticulously arranged facets create a mesmerizing saturation effect, often likened to a star-filled sky. Some interpretations also associate their vaulted forms with the cave where the Prophet Mohammed received his divine revelations, adding a layer of spiritual symbolism.

Over the centuries, artisans devised countless geometric variations of muqarnas, many displaying astonishing ingenuity and complexity. Despite their diversity, all muqarnas share the same fundamental principle: a stepwise transition between two geometries, achieved through a sequence of tiered layers. These tiers can be represented in two-dimensional ceiling plans as contour lines, revealing their underlying logic.

While the construction principle remains simple, historical muqarnas ceilings often feature elaborate geometric patterns, including nonperiodic tilings with multiple rotational symmetries. It is this interplay—between straightforward horizontal layering and intricate planar designs—that lies at the heart of muqarnas' enduring appeal, captivating observers for centuries with their harmonious blend of mathematical precision and artistic splendor.

Algorithmic Composition

How can we formalize a simple yet open-ended algorithm to design intricate muqarnas—and could it unlock entirely new, unseen formations?

This project explores an algorithmic approach to generating muqarnas ceiling plans through selective recursive subdivision.

Starting with two contour lines (representing the top and bottom outlines of a muqarnas), the algorithm iteratively subdivides the space between them into increasingly refined tiles. Crucially, subdivision is not uniform—each tile’s geometric and topological properties determine whether it splits further, enabling both global diversity and local variation within a single design.

Once subdivided, contour lines connect tiles across tiers, and the 2D plan is extruded into three-dimensional form.

Beyond replicating historical muqarnas, this method can generate radically new designs. While traditional muqarnas comprise hundreds of tiles arranged in dozens of layers, computational iteration can produce millions of micro-tiles—so dense that individual polygons dissolve into fluid, continuous surfaces. At this scale, the stepped transitions of classical muqarnas vanish, replaced by undulating concave and convex geometries that no longer require modular embellishment. The result is a fusion of ancient logic and unprecedented form.

Ceiling plan produced through selective subdivision
Materialization:

Muqarna Mutation at Mori Art Museum

How can these algorithmic muqarnas be brought out of the computer into the real world? For their 2019-2020 Future and the Arts exhibition at Mori Art Museum in Tokyo, the curators commissioned a Muqarna Mutation: an algorithmically designed, robotically fabricated, 6-meter wide muqarna to be installed in a central exhibition room. The project explores how - in the context of the fourth industrial revolution - computation and robotic fabrication can bring the splendor of such a rule-based geometric art into the future.

Muqarna Mutation uses the selective subdivision algorithm described above to produce a geometry that connects a massive pre-existing column at the center of an exhibition room to the room's ceiling. The algorithm generates hundreds of thousands of tiles set among sixteen tiers to create an extragavant ornamental transition from column to ceiling.

A mass-produced industrial product, extruded aluminum profiles, is turned into an elaborate ornamental structure through a radical use of information technology: an algorithm successively defines an intricate form, and robots refine and ennoble simple tube elements into an ephemeral ensemble. The resulting structure transcends the historical typology into something new and unseen.

Standing beneath the muqarna, visitors are struck by a mix of bewilderment and curiosity: a disorientating sensory overload partially obscures the underlying compositional logic. Patterns are readily discernible as one changes perspectives, only to disappear again amidst the endless reflections.

The basis of Muqarna Mutation is a massive, pre-existing 1.6m wide structural column situated at the center of one of Mori Museum's exhibition rooms. Rather than contructing a muqarna in the constrained space between the column and the room's walls, the column itself is used as the origin of the muqarna. Muqarna Mutation creates a transition between this column and the room's ceiling.

A selective subdivision algorithm uses the column's outline and the ceiling's contour to produce a muqarna plan with hundreds of individual tiers, and millions of tiny facets. The algorithm refines these countour lines to create a vast landscape with seemingly endless detail, alternating between stalactives and concave formations. This initial design is depicted in the concept development images.

For fabrication, a mass-produced industrial product - extruded aluminum profiles - is robotically refined and ennobled into a elaborate ensemble. Tiling patterns are articulated as 15,000 individual aluminum tubes.

Reflections and interferences between the shiny tubes create a saturation effect that mirrors the muqarna's historical predecessors. Patterns appear and disappear as one moves beneath it and changes perspectives.

Fabrication of the Muqarna Mutation's took place at the ROSO Coop laboratory of Feng Chia University, Taiwan, under the expertise of Yu-Ting Sheng and Shih-Yuan Wang.

The muqarna was partitioned into sixteen horizonal tiers, and these in turn were divided into 40 separate components to facilitate transport and assembly. Individual tiers were robotically milled out high-density EPS. In a second step, thousands of holes of different depths and diameters were robotically drilled into the tiers. Separately, a smooth plastic foil was laser-cut and attached to the tiers to improve the surface quality. To articulate the the tiles of the original design, 15,000 individual hollow aluminum tubes were inserted into the tiers and glued into place. Specific tubes were custom fabricated in order to minimize their weight.

The completed muqarna has a surface area of 24m2 and a height of 2.4 meters.

Fabrication Team


Lead:   Yu-Ting Sheng 盛郁庭 (Feng Chia University)
Shih-Yuan Wang 王識源 (National Chiao Tung University)
Meng Hao 孟浩 (RoboticPlus)

Structural support:   Chen-Tung Chen 陳建同 (YUMU)
Kuan-Fan Chen 陳冠帆 (FA.S Studio)

Fabrication Assistants:   Fei-Fan Sung 宋非凡
Che-Wei Lin 林哲蔚
Wei-Tse Hung 洪維澤
Yu-Hsuan Pang 龐宇軒
Chung-Chieh Cheng 鄭中杰
Yi-Heng Lu 陆亦恒
Nai-Wei Lai 賴乃葳
Chieh-I Liu 劉婕怡
Chang-Chin Lee 李長錦
Shih-Kai Fan 范士凱
Yu-Syuan Wei 魏雨萱
Ching-Yun Tseng 曾慶芸
Ying-Yu Chen 陳盈佑
Yu-Wei Cheng 程昱維
Qin-Fei Liu 劉沁霏
Yen Heng Cheng 鄭硯恆

   

Partners and Sponsors


• Graduate Institute of Architecture - National Chiao Tung University
• RoboticPlus 大界機器人
• Nan Pao Resins Chemical
• YUMU Manufacture and Research
• A.S. Studio 原型結構工程顧問有限公司

Muqarna Mutation is a commission by the Mori Art Museum, Tokyo, for its Future and the Arts exhibition [未来と芸術展]. It premiered in November 2019.