The Holy Spring of the Twelve Apostles in Constantinople is one of hundreds of holy springs in the Queen City, though it is one of the few that can be found outside of a church, on private property, that still functions.
In Constantinople, almost every church has a holy spring which is dedicated to another saint from the one commemorated in the main church and celebrates its own feast separately. The most significant holy springs in the City are in Panagia Blachernae, Panagia Vefa and Saint Demetrios in Xerokrini. The most famous of these holy springs is Zoodochos Pege in Balukli. Besides these, which are well known, there are hundreds of others that can be found even in homes, stores and private spaces. These sacred springs in the City were unique to the Orthodox Church, with none belonging to the Armenians. An exception is Sulu Manastır (Water Monastery), which is an Armenian church with a holy spring, however this shrine is built over the historic Monastery of Panagia Peribleptos from the 11th century, which was forcibly removed from the Romans of the City and given to the Armenians by the Ottomans.