Assertion: gypsum | /r/ObjectUse | used in ancient egypt
Facets:
value: including on the pyramid of kheops
type: LOCATION
Source sentences:
text: Gypsum was also used in ancient Egypt, including on the pyramid of Kheops, which was constructed in 2700 B.C., and is the only surviving wonder of the ancient world (thanks, in part, to gypsum!).
text: However, several archeological surveys have proven that it has been used in ancient cultures like ancient Egypt, Mesopotamia, ancient Rome, the Byzantine Empire, and the Nottingham alabasters of Medieval England.