Toompea (from German: Domberg, "Cathedral Hill") is a limestone hill in the central part of the city of Tallinn, the capital of Estonia. The hill is an oblong tableland, which measures about 400 by 250 metres, has an area of 7 hectares (17 acres) and is about 20–30 metres higher than the surrounding areas. In folklore the hill is known as the tumulus mound over the grave of Kalev, erected in his memory by his grieving wife. Toompea is part of the Tallinn Old Town UNESCO World Heritage Site.