Which building has been the home to the most religious organizations, Gül Mosque or Hagia Irene?
Gül Mosque: Gül Mosque (Turkish: "Gül Camii" , meaning: "The Mosque of the Rose" in English) is a former Eastern Orthodox church in Istanbul, Turkey, converted into a mosque by the Ottomans. Hagia Irene: Hagia Irene or Hagia Eirene (Ancient Greek: Ἁγία Εἰρήνη , Byzantine ] , "Holy Peace", Turkish: "Aya İrini" ), sometimes known also as Saint Irene, is a Greek Eastern Orthodox church located in the outer courtyard of Topkapı Palace in Istanbul, Turkey. Hagia Irene:  It is one of the few churches in Istanbul that has not been converted into a mosque.
Gül Mosque