In 1939 Pierre Montet discovered, within the Amun temple precinct at Tanis, the tombs of kings of the XXIst and XXIInd Dynasties, some of which were undisturbed and contained burial of King Psusennes I, his consort - Mutnedjemet, their son - Ankhefenmut, also Sheshonq II and Wendjebwaendjed - commander of bowmen. They consists of crypts entered via an entrance shaft or ramp and with an antechamber and longish tomb chamber. They were potentially threatened  by sub-soil water and so were not very deeply sunk below the paving of the court. There are three tomb chambers (with a large number  of re-used blocks). Their superstructures, which may have been like those of the tombs of the kings of Sais, have completely disappeared. Only 7 out probably 17 tombs of this kind of the XXIst-XXIInd Dynasties have been found.

Osorkon II was buried in a chamber of granite, with adjoining limestone rooms. Takelot II  was also discovered in this tomb, which had Osirian decorations. The tomb of Psusennes I contained his royal remains and those of Psusennes II, Amenemope and Sheshonq II. An unidentified mummy was also found there. The remains of Psusennes I were found buried in a pink granite sarcophagus enclosed a black granite anthropoid coffin, which in turn held a silver inner coffin with a mask of gold, all probably usurped from earlier burial sites.  but the mummy had been substantially destroyed by the poor conditions. The large sarcophagus  had originally been used 200 years earlier for the burial of Merenptah in the Valley of the Kings.