مقرنس ( Muqarnas )

Muqarnas (Arabic: مقرنص; Persian: مقرنس), also known in Iranian architecture as Ahoopāy (Persian: آهوپای) and in Iberian architecture as Mocárabe, is a form of ornamented vaulting in Islamic architecture. It is the archetypal form of Islamic architecture, integral to the vernacular of Islamic buildings that originated in the Abbasid Empire. The muqarnas structure originated from the squinch. Sometimes called "honeycomb vaulting" or "stalactite vaulting", the purpose of muqarnas is to create a smooth, decorative zone of transition in an otherwise bare, structural space. This structure gives the ability to distinguish between the main parts of a building, and serve as a transition from the walls of a room into a domed ceiling.

Muqarnas is significant in Islamic architecture because its elaborate form is a symbolic representation of universal creation by God. Muqarnas architecture is featured in domes, half-dome entrances, iwans and apses. The two main types of muqarnas are the North African/Middle Eastern style, composed of a series of downward triangular projections, and the Iranian style, composed of connecting tiers of segments.