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 "Nusretiye Mosque"): Nusretiye Mosque is an ornate mosque located in Tophane district of Beyoğlu, Istanbul, Turkey.
Relevant evidence: Yes