 It is a collection of Chán Buddhist koans originally compiled in China during the Song dynasty in 1125 and then expanded into its present form by the Chán master Yuanwu Keqin (1063–1135).Translation with explanatory notes of "The gateless Gate" The Gateless Gate is a collection of 48 Chan (Zen) koans compiled in the early 13th century by the Chinese Zen master Wumen Hui-k’ai (1183–1260) (Japanese