Agha Bozorgh Mosque was constructed for prayers, preaching and teaching sessions held by Molla Mahdi Naraghi II, known as یghی Bozorgh.
The mosque has been described as "the finest Islamic complex in Kashan and one of the best of the mid-19th century". Noted for its symmetrical design, it consists of two large iwans, one in front of the mihrab and the other by the entrance. The courtyard has a second court in the middle which comprises a garden with trees and a fountain. The iwan in front of mehrab has two minarets with a brick dome. It was here where Ustad Ali Maryam as a pupil started his career as an architect.