The Crypt of Civilization is an impenetrable, airtight, room-sized time capsule, built between 1937 and 1940, at Oglethorpe University in Brookhaven, Georgia. The 2,000-cubic-foot (57 m3) repository is meant not to be opened before 8113 AD. It contains numerous artifacts and sound recordings that illustrate civilization and human development to the 20th century. Classic literature and religious texts were also deposited, as well as items showing the extent of scientific progress to 1939.