fix a person or event to a specific year, but establishing a sequence of events can provide indirect evidence to provide or support a precise date. For example, some inscribed stone vessels of the rulers of the first two dynasties were collected and deposited in storage galleries beneath and sealed off when the Step Pyramid of Djoser, a Pharaoh of the Third Dynasty, was built. Another example are blocks from the Old Kingdom bearing the names of several kings, which were reused in the construction of Middle Kingdom pyramid-temples at Lisht in the structures of Amenemhat I. Likewise, the third pylon at Karnak, built by Amenhotep III contained as "fill" material from the kiosk of Sesostris I, along with various stelae of the Second Intermediate Period and the Eighteenth Dynasty of the New Kingdom. Synchronisms with other chronologies, the most important of these being with the Assyrian and Babylonian chronologies, but synchronisms with the Hittites, ancient Palestine, and in the final period with ancient Greece, are also used. The earliest such synchronism is in the 18th century BC where a stela of the Governor of Byblos Yantinu indicates that pharaoh Neferhotep I was contemporary with kings Zimri-Lim of Mari and Hammurabi of Babylon. Other early synchronisms date to the 15th century BC, during the Amarna Period, when we have a considerable quantity of diplomatic correspondence between the Egyptian Kings Amenhotep III and Akhenaten (or possibly Smenkhkare), and various Near Eastern monarchs. (See Chronology of the Ancient Near East.) For the Third Intermediate Period, Shoshenq I has been ascribed a date relative to Rehoboam and the Eponym dating system by Kenneth Kitchen, based on biblical passages about Shishak's campaign. Shoshenq I's absolute date was calculated based on Edwin R. Thiele's theory. Synchronisms with memorials of Apis bull interments. These begin as early as the reign of Amenhotep III and continue into Ptolemaic times, but there is a significant gap in the record between Ramesses XI and the 23rd year of Osorkon II. The poor documentation of these finds in the Serapeum of Saqqara also compounds the difficulties in using these records. Astronomical synchronisms. The best known of these is the Sothic cycle, and careful study of this led Richard A. Parker to argue that the dates of the Twelfth dynasty could be fixed with absolute precision. More recent research has eroded this confidence, questioning many of the assumptions used with the