Lerna Tumulus

The tumulus of Lerna IV was soil mound over the site of the House of Tiles.This low tumulus was surrounded by a ring of stones in order mark off a sacred area or to separate the land of the dead from the land of the living.

See:

1. N. G. L. Hammond, Tumulus-Burial in: The Annual of the British School at Athens, Vol. 62 (1967), pp. 77-105