Khulafa Mosque (1960–63) - based on a design extracted from the 9th-century Abassid mosque and built around the surviving minaret[33] Rafidain Bank, Basra (1970)[34] Sheikh Mubarak Building, Bahrain (1973) [35] International Hilton Hotel, Dubai (1974)[36] Siddique Mosque, Doha (1978)[37] Al-Andalus housing complex, Doha (1983) [38] Kuwait State Mosque (1978-1984) [39] Headquarters for the Regional Arab Organisers, Kuwait (1982–87)[40] Headquarters of the League of Arab States, Tunis (1983) Great Mosque, Oman (1995-2002)[41]