 Eva Baer notes that while this design was essentially simple, it was elaborated by metalworkers into intricate patterns interlaced with arabesques, sometimes organised around further basic Islamic patterns, such as the hexagonal pattern of six overlapping circles.Muqarnas are elaborately carved ceilings to semi-domes, often used in mosques.They are typically made of stucco (and thus do not have a structural function), but can also be of wood, brick, and stone.