The buildings, which he designed at Yıldız Palace, were European in style. The best known of these are Yildiz Palace pavilions and the Yildiz Ceramic Factory (1893–1907), the Janissary Museum and the Ministry of Agriculture (1898), the fountain of Abdulhamit II (1901), Karakoy Mosque (1903), the mausoleum for the Tunisian religious leader Sheikh Zafir Efendi (1905–1906), tomb within the cemetery of Fatih Mosque (1905), Cemil Bey House at Kireçburnu (1905), clock tower for the Hamidiye-i Etfal Hospital (1906).