Thirteen Buddhist Sites of Osaka

Thirteen Buddhist Sites of Osaka（おおさか十三仏霊場, Osaka jūsan butsu reijō）are a group of 13 Buddhist sacred sites in Osaka Prefecture dedicated to the Thirteen Buddhas. The majority of the temples in this grouping are part of Japanese esoteric Shingon Buddhism.

Source: Wikipedia — Thirteen Buddhist Sites of Osaka (CC BY-SA 4.0)