Related to the Shintō notion of the mirror as an object of almost magical potency was the custom of dedicating personal mirrors to Shintō shrines. In the twelfth and thirteenth centuries hope for salvation in Buddhist Pure Land paradises merged with the Shintō notion of certain places as the abode of sacred spirits. Sutras and both Shintō and Buddhist images were buried at such sites believed to be Pure Lands. Associated with this practice was that of throwing mirrors into ponds. Hundreds of examples with bird and flower motifs, such as the lovely ferns and wildflowers seen here, have been recovered from a pond within the precincts of Dewa Shrine atop Mount Haguro in Yamagata Prefecture and are known as Haguro kyō. Their delicate motifs are typical of the art of the Heian aristocracy.