Bengt Gottfried Forselius (ca 1660, Harju-Madise, Harju County, Swedish Estonia – November 16, 1688, Baltic Sea) was a founder of public education in Estonia, author of the first ABC-book in the Estonian language, and creator of a spelling system which made the teaching and learning of Estonian easier. Forselius and Johann Hornung were mainly responsible for making a start at reforming the Estonian literary language in the late 17th century. Some German constructions were abandoned, and a strict spelling system was adopted which still relied on German orthography.