Ribbed Vaulting

Ribbed vaulting — origins, Islamic development, Europe, and India

• Before Islam — the architectural background

  • Romans, Byzantines and Sasanians already possessed sophisticated traditions of arches, barrel vaults, groin vaults and domes.

  • These provided part of the architectural inheritance from which both Islamic and later European builders developed.

  • However, ordinary Roman groin vaulting should not simply be called medieval ribbed vaulting: the intersecting groins were not necessarily constructed as distinct projecting ribs.

Major Islamic innovation — crossed-rib vaulting

• 961–976 — Great Mosque of Córdoba, Umayyad al-Andalus

  • During the enlargement of the mosque under Caliph al-Hakam II, builders created extraordinary domes in which independent arches/ribs cross one another, producing polygons and star-like geometrical compartments.

  • Fuentes and Huerta identify Córdoba's crossed-arch domes as the earliest known vaults of this particular ribbed type. (UPM Open Access)

  • This represents an important development beyond simply constructing a conventional groin vault: the ribs themselves became a conspicuous geometric architectural system.

• 999/1000 — Bab al-Mardum, Toledo

  • The small mosque now known as Cristo de la Luz demonstrates the further development of the Andalusi tradition.

  • Its nine bays are covered by a remarkable variety of vaults employing different intersecting-rib geometries.

  • This is important because ribbed construction was therefore not confined to one exceptional Córdoba dome.

• 11th century onward — Islamic rib vaulting diversifies

  • Islamic architects developed crossed ribs into increasingly elaborate polygonal, stellar and geometrical vaulting systems.

  • Related forms spread through parts of Islamic Spain and North Africa and subsequently appear much farther east.

  • The architectural principle became capable of serving simultaneously as construction, spatial organization and geometric decoration. Fuentes and Huerta note the later geographical appearance of crossed-arch domes as far away as Persia. (UPM Open Access)

 European 

• 1090s — Durham Cathedral, England

  • Durham Cathedral was begun in 1093.

  • Its early rib vaults represent one of the decisive appearances of rib vaulting in northern European architecture.

  • John James's architectural study concludes that the original Durham choir high vaults appear to have been the first of their particular ribbed form. (RCNi Company Limited)

  • Durham's later nave employed stone ribs forming pointed arches; the Durham World Heritage Site identifies this as the earliest known example of that particular structural solution. (durhamworldheritagesite.com)

• The chronology therefore matters:

  • Córdoba: 961–976

  • Toledo: 999/1000

  • Durham: from the 1090s

  • Thus, sophisticated and unmistakable Islamic crossed-rib vaulting is securely documented more than a century before the celebrated northern European development. (UPM Open Access)

• Durham's vaulting was not an exact copy of Córdoba. European builders developed ribs particularly along the lines of a groin vault, eventually making the rib an increasingly important element of the structural system.

• The existence of architectural influence does not require exact copying. An architectural idea can be transmitted, adapted and transformed for different structural purposes.

• The broader historical context is also important: medieval Europe and the Islamic world were not isolated civilizations. By this period, contact through Iberia, the Mediterranean and other routes was facilitating the movement of knowledge and techniques between them.

• Consequently, it can be said:

The surviving architectural chronology shows sophisticated ribbed vaulting in the Islamic world at Córdoba by 961–976 and Toledo by 999/1000, more than a century before the celebrated rib vaults of Durham Cathedral from the 1090s. These European developments occurred during a period of substantial cultural and technological transmission from the Islamic Mediterranean into Latin Europe. Although the precise route by which ribbed-vault concepts reached northern European builders cannot presently be documented, the chronology and wider context make Islamic architectural influence a historical possibility. 

European transformation → Gothic architecture

• During the 12th century, European Romanesque builders increasingly combined ribs + pointed arches + relatively lighter vault webs.

• French Gothic architects then developed the system much further.

• Rib vaulting became one of the defining technologies of Gothic architecture, permitting more flexible bay shapes and helping concentrate vault loads onto piers.

• The result was eventually the great rib-vaulted interiors associated with medieval European cathedrals.

• Thus there is an important distinction between chronological origin and subsequent development: the Islamic crossed-rib tradition precedes Durham, while medieval European architects subsequently transformed rib vaulting into the characteristic structural system of Gothic architecture.

Arrival and evolution in India

• Islamic architectural traditions entered northern India on a major monumental scale with the Ghurid expansion of the late 12th century and the establishment of the Delhi Sultanate.

• Qutb al-Din Aibak — late 12th/early 13th century

  • Under Aibak and his successors, builders introduced an architectural vocabulary associated with the Islamic lands to major new monuments in Delhi.

  • But there was an important transitional stage.

  • Indian masons possessed an exceptionally sophisticated trabeate—post-and-lintel—stone-building tradition.

  • Early Sultanate buildings consequently combined imported Islamic architectural requirements with existing Indian building techniques.

• Early Delhi Sultanate

  • Arches and domes were sometimes constructed through corbelling, rather than using the fully developed arcuate techniques familiar farther west.

  • Indo-Islamic architecture therefore emerged through adaptation between imported architectural concepts and Indian craftsmanship, rather than simply reproducing buildings from Iran, Central Asia or Afghanistan.

• 1311 — Alai Darwaza, Delhi

  • Under Alauddin Khalji, arcuate construction reached a much more mature stage.

  • The Alai Darwaza is dated 1311 and is particularly important for its use of true arches and a true dome; the University of Washington's architectural collection describes it as the earliest Indian example combining these mature Islamic architectural principles. (Digital Collections)

• Later Sultanate → Mughal India

  • Indian Islamic architects subsequently developed extraordinarily sophisticated combinations of arches, vaults, domes, squinches and other transition systems.

  • Persian and Central Asian architectural traditions became especially influential.

  • By the Mughal period these imported traditions had been thoroughly combined with Indian materials, engineering and craftsmanship, producing a distinctive Indo-Islamic architectural tradition rather than simply reproducing western Islamic architecture.

The journey in one sequence

Roman/Byzantine/Sasanian vaulting traditions
→ Islamic adoption and experimentation
→ Córdoba's securely documented crossed-rib domes, 961–976
→ Toledo, 999/1000, showing further Islamic development
→ wider Islamic diversification of geometrical rib systems
→ northern European rib vaulting at Durham, 1090s
→ European Romanesque development
→ Gothic structural rib vaulting, 12th–13th centuries
→ Ghurid/Delhi Sultanate transmission of Islamic arcuate architectural traditions into India, late 12th century onward
→ Indian adaptation and experimentation
→ mature true arch and dome construction exemplified by Alai Darwaza, 1311
→ later Sultanate and Mughal synthesis of Indian, Persian and Central Asian architectural traditions.