The document summarizes key aspects of Japan's Heian period (794-1185), when Kyoto served as the imperial capital. It describes how Emperor Kanmu moved the capital to Heian-kyo to escape disasters in Nagaoka-kyo. The imperial palace in Kyoto was rebuilt several times after fires and served as the official residence of the imperial family until 1869. It also notes that Murasaki Shikibu's "The Tale of Genji" was the world's first novel and centered on life in the Heian court.