The Queen Alia Mausoleum in Amman, Jordan by Halcrow Group Architectural Practice in 1980. Overlooking the Jordan valley and 17km from Amman, the site lies atop a prominent hill not far from the Royal Palace. The prayer hall, which accommodates 500 person, is covered with a large central dome and the four lateral areas are covered with smaller ones. To the right of the main entry is placed the black marble sarcophagus of the late Queen. The mosque’s principal structure is a reinforced concrete frame. The ferroconcrete mesh domes are surfaced with trowelled concrete skins, a technology adapted from ship building.