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groin vault

architecture
Also known as: cross vault

Quick Summary

A groin vault is a structural element in architecture formed by the intersection of two barrel vaults at right angles. This creates a square plan where the thrusts are concentrated at the four corners, allowing for less massive supporting walls compared to a continuous barrel vault.1

The development of the groin vault by Roman architects allowed for spanning rectangular areas of unlimited length. However, its construction required precise stone cutting, a skill that declined in the West after the fall of Rome. Vaulting techniques were preserved and advanced in the Byzantine Empire and the Islamic world.1

In medieval Europe, the groin vault was modified into the rib vault, which uses a skeleton of arches or ribs to support the masonry. This innovation, combined with pointed arches, allowed for greater height and lighter construction, paving the way for Gothic architecture.213

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