An oblong window from stucco with colored glass. It is divided into three horizontal oblong zones.

The first zone is ornamented with a raised inscription in Persian high relief calligraphy. It consists of the Testimony of Monotheism "There is no God other than Allah, and Mohammad is the Messenger of Allah."

The second zone consists of four squares containing the names of the four Rightly Guided Caliphs (Abu Bakr, Omar, Othman, and Ali)(Abū Bakú, ̉umar,uţmān, alỉ). The third oblong zone contains the words "May God be pleased with them". It has outwork ornamentation with a colored glass background.

Windows like this were used in various buildings to reduce the strong sunlight that penetrates plain glass windows. Also they produce a wonderful harmony of color, when the sunlight shines through the colored glass.