1980
(1962); 1982
1979
2000-100 BCE
1990-96
1978
1986 (replica); 1501-1600 (original)
circa 1980
1978-1980
4000-2001 BCE
1903 (original); 1982 (model)
1970 and post 1989
2686-2613 BCE
circa 1979
1985-04
1989-08
circa 3000 BCE
3000 BCE