The Historia Welforum is an anonymous Latin prose chronicle of the House of Welf written around 1170. The original covers the period c. 825–1167, but continuations bring it down to 1208. Because two manuscript copies originate in Weingarten (Altdorf), the work is sometimes known as the Historia Welforum Weingartensis or Chronica Altorfensium.

The House of Welf is a European dynasty that has included many German and British monarchs from the 11th to 20th century and Emperor Ivan VI of Russia in the 18th century. The originally Franconian family from the Meuse-Moselle area was closely related to the imperial family of the Carolingians.