The Pishtaq As Monumental Facade

A pishtaq is the rectangular frame, rising above the roofline, that surrounds the arched opening of an iwan and announces it from a distance as the building's principal entrance or focal facade. Built as a flat, freestanding screen wall pierced by the iwan's arch, the pishtaq typically carries the most concentrated decorative program of the entire building: bands of glazed tile in geometric or floral patterns, monumental calligraphic inscriptions naming the patron or citing scripture, and in the richest examples, muqarnas vaulting lining the underside of the arch itself.

Because the pishtaq's height usually exceeds the roof behind it, its primary function is less structural than scenographic, framing and dramatizing the iwan's dark recessed opening against a tall bright field of pattern and script, so that the entrance reads clearly against the skyline before a visitor is close enough to see the building's actual massing. In the four-iwan mosque and madrasa plan, each of the four iwans typically carries its own pishtaq, and the pair flanking the main entrance and the qibla iwan are usually built to a matched or near-matched height and design, creating the strong bilateral symmetry associated with Timurid and Safavid religious architecture.