This mosque was built by Umur Bey in 1449 or 1451 during the reign of Murad II. Umur Bey, both a soldier and a scholar, was granted with the rank of a vizier during the reign of Murad Il.
There is a marble epitaph board at either side of the mosque’s entrance door, written in Turkish. These are the first waqf charts known in Bursa being written in Turkish.
This structure, together with its portico for latecomers, is built with a rectangular plan.
The main prayer hall is built with a square plan. This hall is domed.
It is known that a second room was used for education purposes at the time when this mosque was initially built.
The portico for latecomers is borne by three columns from the Byzantine era with Corinthian capitals. This mosque has a graveyard. Furthermore, there is the “Umur
Bey” drinking fountain set into the structure’s western wall. This mosque was renovated between 1627 and 1628, in 1795, 1825, 1858, and in 2014.