Built in 1910 as the Heliopolis Palace Hotel, the grandest hotel on the continent of Africa, converted to a British military hospital during both World Wars. After WWII the building was abandoned until it was converted to house the headquarters of the shortlived Federation of Arab Republics in 1972, when it was given the official name it still carries, Unity Palace. It was finally restored by Hosni Mubarek in the 1980s to serve as the Presidential Palace.