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Tanis is unattested before the 19th Dynasty of Egypt, when it was the capital of the 14th nome of Lower Egypt.[b] A temple inscription datable to the reign of Ramesses II mentions a "Field of Tanis", while the city in se is securely attested in two 20th Dynasty documents: the Onomasticon of Amenope and the Story of Wenamun, as the home place of the pharaoh-to-be Smendes.:921
The earliest known Tanite buildings are datable to the 21st Dynasty. Although some monuments found at Tanis are datable earlier than the 21st Dynasty, most of these were in fact brought there from nearby cities, mainly from the previous capital of Pi-Ramesses, for reuse. Indeed, at the end of the New Kingdom the royal residence of Pi-Ramesses was abandoned because of the Pelusiac branch of the Nile in the Delta being silted up and its harbour consequently becoming unusable.:922
After Pi-Ramesses' abandonment, Tanis became the seat of power of the pharaohs of the 21st Dynasty, and later of the 22nd Dynasty (along with Bubastis). The rulers of these two dynasties supported their legitimacy as rulers of Upper and Lower Egypt with traditional titles and building works, although they pale compared to those at the height of the New Kingdom. A remarkable achievement of these kings was the building and subsequent expansions of the Great temple of Amun-Ra at Tanis (at the time, Amun-Ra replaced Seth as the main deity of the eastern Delta), while minor temples were dedicated to Mut and Khonsu whom, along with Amun-Ra, formed the Theban Triad. The intentional emulation towards Thebes is further stressed by the fact that these gods bore their original Theban epithets, leading to Thebes being more commonly mentioned than Tanis itself.:922 Furthermore, the new royal necropolis at Tanis successfully replaced the one in the Theban Valley of the Kings.
After the 22nd Dynasty Tanis lost its status of royal residence, but became in turn the capital of the 19th nome of Lower Egypt. Starting from the 30th Dynasty, Tanis experienced a new phase of building development which endured during the Ptolemaic Period.:922 It remained populated until its abandonment in Roman times.
In Late Antiquity, it was the seat of the bishops of Tanis, who adhered to the Coptic Orthodox Church.
Though briefly explored in the early 19th century, the first true archaeological excavations at Tanis were made by Auguste Mariette and Flinders Petrie in the late 1800s. During the subsequent century the French carried out several excavation campaigns directed by Pierre Montet, then by Jean Yoyotte and subsequently by Philippe Brissaud.:921 For some time the overwhelming amount of monuments bearing the cartouches of Ramesses II or Merenptah led archaeologists to believe that Tanis and Pi-Ramesses were in fact the same. Furthermore, the discovery of the Year 400 Stela at Tanis led to the speculation that Tanis should also be identified with the older, former Hyksos capital, Avaris. The later re-discovery of the actual, neighbouring archaeological sites of Pi-Ramesses (Qantir) and Avaris (Tell el-Dab'a) made clear that the earlier identifications were incorrect, and that all the Ramesside and pre-Ramesside monuments at Tanis were in fact brought here from Pi-Ramesses or other cities.:921-2
There are ruins of a number of temples, including the chief temple dedicated to Amun, and a very important royal necropolis of the Third Intermediate Period (which contains the only known intact royal pharaonic burials -- the tomb of Tutankhamun having been entered in antiquity). The burials of three pharaohs of the 21st and 22nd Dynasties -- Psusennes I, Amenemope and Shoshenq II -- survived the depredations of tomb robbers throughout antiquity. They were discovered intact in 1939 and 1940 by Pierre Montet and proved to contain a large catalogue of gold, jewelry, lapis lazuli and other precious stones, as well as the funerary masks of these kings.
The chief deities of Tanis were Amun; his consort, Mut; and their child Khonsu, forming the Tanite triad. This triad was, however, identical to that of Thebes, leading many scholars to speak of Tanis as the "northern Thebes".
In 2009, the Egyptian Culture Ministry reported archaeologists had discovered a sacred lake in the temple of Mut at Tanis. The lake, built out of limestone blocks, had been 15 meters long and 5 meters deep. It was discovered 12 meters below ground in good condition. The lake could have been built during the late 25th-early 26th Dynasty.
In 2011, analysis of high-resolution satellite imagery, led by archaeologist Sarah Parcak of the University of Alabama at Birmingham, found numerous related mud-brick walls, streets, and large residences, amounting to an entire city plan, in an area that appears blank under normal images. A French archeological team selected a site from the imagery and confirmed mud-brick structures approximately 30 cm below the surface. However, the assertion that the technology showed 17 pyramids was denounced as "completely wrong" by the Minister of State for Antiquities at the time, Zahi Hawass.
Tanis is fictitiously portrayed in the 1981 Indiana Jones film Raiders of the Lost Ark, as a lost city which was buried in antiquity by a massive sandstorm until being rediscovered by a Nazi expedition looking for the Ark of the Covenant.
Wendjebauendjed's funerary mask
Pharaoh Osorkon II's tomb at Tanis
The gold funerary mask of Psusennes I