Ertuğrul Tekke Mosque - Credit: Wikimedia Commons
The Ertuğrul Tekke Mosque, (), is an Ottoman imperial mosque located in Yıldız neighbourhood, Serencebey rise of Beşiktaş district in Istanbul, Turkey. A late Ottoman period mosque, it is constructed as a külliye consisting of a tekke, guest house, türbe, fountain, and library in addition to the mosque. Read more on Wikipedia
Source: en.wikipedia.org