Architecture

Architecture Intelligence

The Mukaab represents a paradigm shift in architectural thinking. At 400 meters on each side, this perfect cube challenges every convention of supertall design. Where traditional skyscrapers taper to reduce wind loads and create visual dynamism, The Mukaab embraces the cube form as both structural statement and cultural symbol. Designed by AtkinsRealis with inspiration drawn from the historic Murabba Palace and the modern Najdi architectural tradition of central Saudi Arabia, the building seeks to merge heritage with unprecedented technological ambition.

The architectural program encompasses 2 million square meters of floor space housing an extraordinary mix of uses. At its center rises a spiral tower — a skyscraper within a skyscraper — surrounded by a 300-meter holographic dome capable of projecting immersive virtual environments. The triangular exterior cladding system responds to solar orientation while creating the distinctive geometric pattern that defines the building’s visual identity from across Riyadh’s skyline.

The Scale of Architectural Ambition

To understand the Mukaab’s architectural significance, one must first grasp its scale in absolute terms. The building’s 64 million cubic meters of enclosed volume will make it nearly five times larger than the Boeing Everett Factory, the current record holder for the world’s largest building by volume at 13.4 million cubic meters. Its 2 million square meters of floor area surpasses the New Century Global Center in Chengdu, China, which holds the current record at 1.76 million square meters. The 640,000 square meters of exterior surface exceeds the Burj Khalifa’s cladding area by a factor of more than five.

These numbers translate into a building that could comfortably contain 20 Empire State Buildings within its volume. The 70 estimated floors are organized around the internal spiral tower, creating a three-dimensional city where horizontal and vertical movement merge into a continuous spatial experience. The structural steel requirement of 1 million tonnes represents more than 30 times the steel used in the Empire State Building, reflecting the material intensity demanded by maintaining a full 400-meter cross-section from base to roof.

Cube Geometry as Architectural Statement

The decision to adopt a cube form rather than a conventional tapered tower is the single most consequential architectural choice in the project. The cube geometry analysis reveals that this form maximizes enclosed volume relative to building footprint while creating an iconic silhouette that distinguishes the Mukaab from every other building in the world. No structure of this form and scale has ever been built or seriously proposed.

The Arabic word “Mukaab” translates directly as “cube,” binding the building’s identity to its geometry. This linguistic and formal connection ties the project to the geometric traditions of Islamic art and architecture, where regular polyhedra hold particular aesthetic and symbolic significance. The cube also extends the square plan of the Murabba Palace — King Abdulaziz’s historic residence — into three dimensions, creating a dialogue between Saudi Arabia’s architectural past and its Vision 2030 future.

However, the cube form imposes severe structural penalties. The 160,000-square-meter flat faces generate wind loads far exceeding those on an aerodynamically shaped tower. The uniform cross-section from base to top means the structure carries significant dead load at upper levels where a tapered tower would have shed mass. The foundation system must support the full concentrated weight without any reduction in floor plate size, demanding 1,200 piles driven into the desert substrate of the al-Qirawan district.

AtkinsRealis and the Design Vision

AtkinsRealis, the Montreal-headquartered global professional services company formerly known as SNC-Lavalin, won the masterplan design commission with a scheme that positions the Mukaab as the focal point of an 18-neighborhood, 19-square-kilometer downtown development. The firm’s dual expertise in architecture and engineering provides the integrated design capacity essential for a project where structural systems, facade engineering, and interior spatial planning are inseparable from the architectural concept.

The design philosophy rests on cultural rootedness in the Najdi architectural tradition, technological ambition expressed through the holographic dome and immersive digital systems, walkable urbanism based on 15-minute city principles, and sustainability targets including net-zero energy goals and 25 percent green space allocation across the broader development.

Interior Architecture and the Spiral Tower

The Mukaab’s most extraordinary architectural element is invisible from the outside. The internal spiral tower constitutes the world’s first fully enclosed skyscraper — a tower rising within the protected environment of the cube’s interior. Surrounded by the 300-meter holographic dome and wrapped in digital projection surfaces, this internal structure creates a spatial experience without precedent in architectural history.

The spiral tower operates free from the constraints that govern conventional skyscrapers. It does not need to resist wind loads, because the cube’s mega-frame shields it from external forces. Its facade can prioritize visual permeability over weather-tightness. Observation decks at multiple levels offer views inward across the Mukaab’s cavernous interior rather than outward over the city, while a rooftop garden creates an elevated green space entirely enclosed by the cube’s protective shell.

The interior organization distributes uses across the 2 million square meters with public-facing retail, entertainment, and cultural spaces concentrated at lower levels, hospitality and commercial spaces in middle zones, and residential units at upper levels where privacy can be maintained. The structural design accommodates this mixed-use program through transfer structures allowing column-free spans in retail areas and regular grids in residential zones.

Facade Engineering and Desert Performance

The triangular panel cladding system covering the Mukaab’s exterior draws directly from Najdi architectural motifs — the stepped parapets and geometric crenellations found on traditional buildings of central Saudi Arabia. Each triangular panel is positioned within a parametric array that optimizes solar shading based on the specific solar incidence angle at each position on the cube’s surface.

The facade must perform in extreme desert conditions where summer temperatures exceed 45 degrees Celsius, shamal winds carry abrasive sand particles, and annual solar irradiance exceeds 2,200 kWh per square meter. Manufacturing, transporting, and installing hundreds of thousands of individual panels at heights up to 400 meters represents a logistical challenge comparable to the structural steel procurement in both complexity and cost.

The Broader Masterplan Context

The architectural vision extends beyond the cube itself to encompass the full New Murabba development. The New Murabba Stadium, designed separately by Arup with a 46,010-seat capacity for the FIFA 2034 World Cup, sits within the masterplan alongside cultural institutions, an iconic museum, a technology and design university, and 80 entertainment venues. The 18 neighborhoods radiate outward from the Mukaab, creating a walkable urban fabric that will ultimately house 400,000 residents across 104,000 residential units.

The masterplan integrates transportation infrastructure including an airport and high-speed train station planned for Phase 3 completion by 2040, with Parsons Corporation serving as infrastructure lead design consultant and Bechtel providing project management for the masterplan and site-wide systems.

Current Status and Design Evolution

The January 2026 construction suspension has introduced uncertainty into the architectural program. While infrastructure design continues — Parsons Corporation was awarded a 60-month contract in January 2026 — the scope and timeline for the Mukaab building itself is under review as part of Saudi Arabia’s broader reassessment of Vision 2030 megaprojects. AtkinsRealis’s design team may need to adapt its plans to reflect revised timelines, potentially modified building programs, and the phased delivery approach now being adopted across Saudi giga-projects.

Despite this pause, the excavation progress stands at 86 percent completion with approximately 10 million cubic meters of earth already moved, and 1,000 of the planned 1,200 foundation piles have been installed by HSSG Foundation Contracting. The physical groundwork for the architectural vision continues even as the superstructure timeline is reassessed.