Byzantine Emperor Leon Flavius I, or Princess Thekla, daughter of Emperor Theophilos.
Architect:
Unknown
- Changes the building has undergone since its construction
In 1059, during the reign of Emperor Isaakios II Komnenos, a major repair and decoration was carried out.
It was converted into a mosque by Grand Vizier Koca Mustafa Pasha during the Ottoman period.
It was recorded together with the Koca Mustafa Pasha Mosque in the Istanbul Foundations Tax Register of 1546.
It was remodeled according to Turkish architectural style, a flat dome was added and new windows were opened.
It was damaged in the Balat fire of 1729, but has survived to the present day without a courtyard.
Its minaret, which was partially destroyed in the 1894 earthquake, was rebuilt by adding a stone cone.
- Prominent features of the mosque
It is also known as Atik Mustafa Pasha Mosque.
The church known by the names of Kristos Pentepoptes, Saints Peter and Marcus; according to one view, was built in the 5th century AD (approximately 458) in dedication to the apostles Mark and Peter. According to another view, it was built in the 9th century AD by Princess Thekla, daughter of Emperor Theophilos, in the name of Saint Thekla.
To the right of the church apse is the shrine of Jabir, companion of the Prophet.
The flat dome and classical style mihrab added during the Turkish period attract attention. The main hall in the shape of a cross is entered by passing through the wooden narthex.
Across the entrance is a fountain built by Şatır Hasan Agha in 1692-93.