The Saint Antoine Church is located on Istiklal Street in Beyoglu, Istanbul. The construction began on August 23rd, 1906 and it was completed and opened to service in 1912. Its architect is Giulio Mongeri, who was born in Istanbul. The church which was governed by Italian priests is the greatest Catholic Church in Istanbul with the biggest number of congregation. It was openned to service on February 15th, 1912.