What is "gonbad"

In traditional Persian architecture, a dome is referred to as a gonbad . The history of designing gonbads dates back to pre-Islamic Persia. The Parthians in particular were very keen in using such structures in their designs. The Sassanids inherited them and elevated their designs into full maturity.

A gonbad is often double layered, and can have many shapes, such as semi-spherical, partial spherical, onion shaped, paraboloid, polygonal conical, and circular conical.

In pre-Islamic times, the gonbad was a sign of imperial grandeur for the king. In Islamic times, the tradition continued, and the interiors were made to simulate the celestial dome, reminding the Muslim of Man's place in the cosmos compared to God and creation.