"The Frog Prince; or, Iron Henry" (German: Der Froschkönig oder der eiserne Heinrich, literally "The Frog King or the Iron Henry") is a German fairy tale collected by the Brothers Grimm and published in 1812 in Grimm's Fairy Tales (KHM 1). Traditionally, it is the first story in their folktale collection. The tale is classified as Aarne-Thompson type 440."The Frog Prince" can be compared to the similar European fairy tale "The Frog Princess". Source: Wikipedia (en)