Question: Which location, Nusretiye Mosque and Dolmabahçe Palace served as the main administrative center of the Ottoman Empire from 1856 to 1887 and 1909 to 1922?
Sentence (from "Lala Mustafa Pasha Mosque"): The cathedral was converted into a mosque after the Ottoman Empire captured Famagusta in 1571 and it remains a mosque to this day.
Relevant evidence: No