One of the Erfurt Manuscripts is the Tosefta, dating from the 12th century. The Tosefta is a collection of ancient jewish oral laws collected by scholars in the first 200 years AD. Copies of Tosefta were not made very often. The Erfurt Tosefta is the oldest of only three known Tosefta manuscripts. It was written in the 12th century. The other two Tosefta manuscripts are the Vienna Tosefta, made in the late 13th century, held by the Austrian National Library and the London Tosefta, made in 15th century, held by the British Library.