Shali Fortress. Located in Siwa Oasis, Egypt. Built by the Siwan people in kershef, a mix of salt rock and mud, and left to melt after the heavy rains of 1926
Beauvais Cathedral, France, 1225-1578: its choir vault is the tallest ever built in a Gothic cathedral, and after part of it collapsed in 1284 the nave was never built at all
Pilgrimage Church of Birnau, Lake Constance (1746-1750) - Peter Thumb, with stucco by Joseph Anton Feuchtmayer and ceiling frescoes by Gottfried Bernhard Goz
Fujian Tulou. Located in Yongding and Nanjing counties, Fujian, China. Built by Hakka and Minnan clans in rammed earth, individual builders unknown, round fortress homes for whole villages