 Some attempt at using the open tombs was made at the start of the Twenty-first Dynasty, with the High Priest of Amun, Pinedjem I, adding his cartouche to KV4.The Valley began to be heavily plundered, so during the Twenty-first Dynasty the priests of Amun opened most of the tombs and moved the mummies into three tombs in order to better protect them.They removed most of the treasure in order to further protect the bodies from robbers.