Begun in Karim Khan’s time, this mosque next to the Bazar-e Vakil has an impressive tiled portal, a recessed entrance decorated with tiles and muqarnas , two vast iwans , a magnificent inner courtyard surrounded by beautifully tiled alcoves and porches, and a pleasingly proportioned 75m-by-36m vaulted prayer hall supported by 48 carved columns. Inside the prayer hall are an impressive mihrab and 14-step marble minbar, carved from a monolith carried all the way from Azerbaijan. Much of the tiling, with its predominantly floral motifs and arabesques, was added in the early Qajar era. You’ll find it near the exit from the Shamshirgarha Bazaar.
Source: Lonely Planet