In view of Dungi's exceptionally long reign, it is probable that Bûr-Sin was already advanced in years when he succeeded his father upon the throne of Ur. However this may be, he reigned for only nine years, and Gimil-Sin, his son who succeeded him, for only seven years.[26] A longer reign was that of Ibi-Sin, Gimil-Sin's son and successor, who held his throne for a generation, but finally lost it and brought Ur-Engur's dynasty to an inglorious end. These last rulers of the Dynasty of Ur appear to have maintained the general lines of Dungi's policy, which they inherited from him along with his empire. The Elamite provinces required to be kept in check by the sending of military expeditions thither, but in Babylonia itself the rule of Ur was accepted without question, and her kings were free to devote themselves to the adornment of the great temples in the land. It is of interest to note that under Bûr-Sin and his son the importance of the central shrine of Nippur was fully recognized, and emphasis was laid on Enlil's position at the head of the Babylonian pantheon. Evidence of this may be seen in the additional titles, which these two rulers adopted in their foundation-inscriptions and votive texts that have come down to us. Bûr-Sin's regular titles of "King of Ur, king of the four quarters" are generally preceded by the phrase "whose name Enlil has pronounced in Nippur, who raised the head of Enlil's temple," while Gimil-Sin describes himself as "the beloved of Enlil," "whom Enlil has chosen as his heart's beloved," or "whom Enlil in his heart has chosen to be the shepherd of the land and of the four quarters." From inscriptions found at Nippur we know that Bûr-Sin added to the great temple of E-kur, and also built a storehouse for offerings of honey, butter and wine, while his third year was dated by the construction of a great throne in Enlil's honour. Gimil-Sin appears to have been equally active in his devotion to the shrine, for two years of his short reign derive their titles from the setting up of a great stele and the construction of a sacred boat, both in honour of Enlil and his consort.