After his death, Twosret simply assumed his Regnal Years and ruled Egypt as a queen for a year or two at the most. Siptah was buried in the Valley of the Kings, in tomb KV47, but his mummy was not found there. In 1898, it was discovered along with 18 others in a mummy cache within the (KV35) tomb of Amenhotep II. The study of his tomb shows that it was conceived and planned in the same style as those of Twosret and Bay, clearly part of the same architectural design.