The church of the Holy Peace (Hagia Eirene) was built in the fourth century at the place where the old church of the bishop of Byzantium stood before the refoundation of Constantine the Great. The church was destroyed by fire in 532 and then rebuilt. Its present shape goes back to a restoration after an earthquake in 740. The Hagia Eirene formed a complex together with the Hagia Sophia, the Hospital of Sampson in between and some other subsidiary building, and it was served by the same clergy. Though the Hagia Eirene was always one of the greatest churches of Byzantium, it is mentioned rarely by the sources in later times. In the ottoman time it became an armoury and later a military museum.