Imrahor Monument - Ilyas Bey Mosque

Imrahor Monument which is in Yedikule and which is also known as Ilyas Bey Mosque is one of the most ancient structures of Byzantine Period in Istanbul, and was constructed in 5th century. Monastery and the church, known as Studios, having the name of its architect, kept its position as an important religious center in Byzantine Period.

During Latin invasion the church-monastery was destroyed for the most part. In XIII. Century the much needed repairs were made and it was surrounded with thick walls. After the conquest of Istanbul, the building was turned into a mosque by Ýlyas Bey in 1486. The building which was destroyed in time due to earthquake and fire was left unrepaired, existing in the same state to date.