Beşir Ağa Complex

The mosque and probably the entire complex were repaired in the reign of Sultan Mahmud II (1826–1839).
In the 1950s, the lodge building suffered a fire; it was repaired by the Directorate of Foundations.
In 1986, the courtyard section of the mosque was completely altered; an underground fountain and latrines were built.
After the books in the library were transferred to the Süleymaniye Library, the library space remained neglected and fell into ruin.
After being restored, the lodge was used for a period by the Folklore Association; later it was used with the function of the Western Thrace Solidarity Center.

The complex is a small-scale group of structures consisting of a mosque, library, sebil, lodge, primary school, and madrasa.
The group of structures reflects the baroque influence of the post-Tulip Period as one of its early examples.
The sebil at the corner was made of marble; it holds a special place among the sebils of Istanbul as one of the first applications of the baroque style.
The madrasa, like the mosque, was built with a mixed stone-and-brick technique; its construction date is given as Hijri 1157 (1744), and it is recorded that it had 12 cells during its active period.
According to the inscription of the lodge (zâviye), it is dated Hijri 1158 (1745); it consists of dervish cells, a kitchen, a dining hall, a selâmlık, and a tevhidhane.
The waqf deed of the complex was issued on the same date and is preserved in the Süleymaniye Library.