Holy Spirit Cathedral of Istanbul - Credit: Wikimedia Commons
The Cathedral of the Holy Spirit, alternatively known as the St. Esprit Cathedral (Turkish: Saint Esprit Kilisesi), located on Cumhuriyet Avenue 127/A, in the quarter of Pangaltı in Şişli district, the former Harbiye, between Taksim Square and Nişantaşı, is one of the main Catholic churches in Istanbul, Turkey. This 19th century cathedral is behind the walls of the French Notre Dame de Sion high school. While walking from Taksim towards Harbiye, some may notice a door with metal bars leading to the school's courtyard beyond which is a statue of Benedict XV. Past the door stands the cathedral. Read more on Wikipedia
Source: en.wikipedia.org