During most of the Nara Period (710-794), Nara served as the capital of Japan and was known as Heijo-kyo. The Heijo Palace extended about one kilometer wide and one kilometer long and served as the site of the emperor’s residence and government offices. For its great historical and cultural importance, the palace site is included as one of the UNESCO World Heritage Sites of Nara.
Although the palace once stood as the majestic center of the ancient capital, all of its original buildings were eventually lost, with the exception of a single hall that was moved in the 8th century and now stands at Toshodaiji Temple. When the capital was moved away from Heijo-kyo in 784, Heijo Palace and a large part of the city were abandoned as officials and other citizens flocked to the new capital. The temples on the outskirts of the former capital, however, retained their importance, and the city of Nara eventually resumed its growth around these temples, while the palace grounds were used for nothing but rice fields.