tumulus

An ancient grave mound; a barrow.

A sepulchral mound, as the famous Mound of Marathon raised over the bodies of those Athenians who fell in repelling the invading Persians; a barrow; very frequently, a mound covering and inclosing a more or less elaborate structure of masonry.

An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow.

A mound of earth, especially one placed over a prehistoric tomb; a barrow.

(archeology) a heap of earth placed over prehistoric tombs