As Sammu-rammat was evidently a royal princess of Babylonia, it seems probable that her marriage was arranged with purpose to legitimatize the succession of the Assyrian overlords to the Babylonian throne. The principle of "mother right" was ever popular in those countries where the worship of the Great Mother was perpetuated if not in official at any rate in domestic religion. Not a few Egyptian Pharaohs reigned as husbands or as sons of royal ladies. Succession by the female line was also observed among the Hittites. When Hattusil II gave his daughter in marriage to Putakhi, king of the Amorites, he inserted a clause in the treaty of alliance "to the effect that the sovereignty over the Amorite should belong to the son and descendants of his daughter for evermore".[464] As queen or queen-mother, Sammu-rammat occupied as prominent a position in Assyria as did Queen Tiy of Egypt during the lifetime of her husband, Amenhotep III, and the early part of the reign of her son, Amenhotep IV (Akhenaton). The Tell-el-Amarna letters testify to Tiy's influence in the Egyptian "Foreign Office", and we know that at home she was joint ruler with her husband and took part with him in public ceremonials. During their reign a temple was erected to the mother goddess Mut, and beside it was formed a great lake on which sailed the "barque of Aton" in connection with mysterious religious ceremonials. After Akhenaton's religious revolt was inaugurated, the worship of Mut was discontinued and Tiy went into retirement. In Akhenaton's time the vulture symbol of the goddess Mut did not appear above the sculptured figures of royalty. What connection the god Aton had with Mut during the period of the Tiy regime remains obscure. There is no evidence that Aton was first exalted as the son of the Great Mother goddess, although this is not improbable. Queen Sammu-rammat of Assyria, like Tiy of Egypt, is associated with social and religious innovations. She was the first, and, indeed, the only Assyrian royal lady, to be referred to on equal terms with her royal husband in official inscriptions. In a dedication to the god Nebo, that deity is reputed to be the protector of "the life of Adad-nirari, king of the land of Ashur, his lord, and the life of Sammu-rammat, she of the palace, his lady".[465] During the reign of Adad-nirari IV the Assyrian Court radiated Babylonian culture and traditions. The king not only recorded his descent from the first Shalmaneser, but also claimed to be a descendant of Bel-kap-kapu, an earlier, but, to us, unknown, Babylonian monarch than "Sulili", i.e. Sumu-la-ilu, the great-great-grandfather of Hammurabi. Bel-kap-kapu was reputed to have been an overlord of Assyria.