KV20 is a tomb in the Valley of the Kings (Egypt). It was probably the first royal tomb to be constructed in the valley. KV20 was the original burial place of Thutmose I (who was later re-interred in KV38) and later was adapted by his daughter Hatshepsut to accommodate both her and her father. The tomb was known to the Napoleonic expedition in 1799 and had been visited by several explorers between 1799 and 1903, but a full clearance of the tomb only was undertaken by Howard Carter in 1903–1904. KV20 is distinguishable from other tombs in the valley, both in its general layout and because of the atypical clockwise curvature of its corridors.