Omiya Library has a lot of collections that Otani Expedition Party brought back from the Silk Road, the ancient trade road in Central Asia, and also has many precious books from inside and outside of Japan, including those granted by Nishi Hongan-ji Temple and designated as national treasures and important cultural assets.
大宮図書館には大谷探検隊のシルクロード将来品の数々が収蔵されるほか、西本願寺から下賜された国宝・重要文化財を含む国内外の貴重書が多数所蔵される。