About 800, Schenklengsfeld had its first documentary mention as Lengesfeld in Thuringia in the Hersfeld Abbey's Breviarium Sancti Lulli ("Saint Lullus's Summary") and grew quickly into an Amt centre with a Vogtei, court and Amtmann.
In 1455, near Lengsfeld in the Amt of Landeck, a healing spring was mentioned.