The First National Architectural Movement in the early 20th century sought to create a new architecture, which was based on motifs from Seljuk and Ottoman architecture. The leading architects of this movement were Vedat Tek (1873–1942), Mimar Kemaleddin Bey (1870–1927), Arif Hikmet Koyunoğlu (1888–1982) and Giulio Mongeri (1873–1953). Buildings from this era are the Grand Post Office in Istanbul (1905–1909), Tayyare Apartments (1919–1922), Istanbul 4th Vakıf Han (1911–1926), State Art and Sculpture Museum (1927–1930), Ethnography Museum of Ankara (1925–1928), the first Ziraat Bank headquarters in Ankara (1925–1929), the first Türkiye İş Bankası headquarters in Ankara (1926–1929), Bebek Mosque, and Kamer Hatun Mosque.