HATSHEPSET or HATASU (fl. i Soo B.c. ), Egyptian queen, daughter of Thotmes I., sister and queen of the short reigned Thotmes II., after whose death she secured the crown in spite of opposition from the future Thotmes III., who was the son either of Thotmes I. or of Thotmes II. She acquired fame by her magnificent terrace-temple at Der el-Bahri and by her obelisks at Thebes, the expenses of which were partly met by the treasure hunting expeditions which she sent to South Arabia. The long military inactivity of her reign, during which State affairs were in the hands of her partisans, shook Egyptian power in Asia. In 1841 her tomb was discovered on a cliff behind the Valley of the King's Tomb. Her successor Thotmes III. had her name and figure cut off from the sculptures in her temple and treated the remains of her partisans in a similar manner.