The Sinan Pasha Mosque is an Ottoman mosque located in a densely populated district of Beşiktaş, in Istanbul, Turkey. It was built by famous Ottoman architect Mimar Sinan from the order of the admiral Sinan Pasha. The türbe of Barbaros Hayrettin Pasha is located just across the street. Mosques of Mimar Sinan has been "said to have changed the history of architecture."