The Battle of Matthew's Day was fought near Viljandi on 21 September 1217 during the Livonian Crusade. The adversaries were the Sword Brethren with their recently converted Livonian and Latgalian alli
The Madi stone grave, part of the presumed battlefield
Battle of St. Matthew's Day
Ruins of the later Risti Chapel, presumed site of a follow-up battle
Memorial to Caupo, who was fatally wounded in the battle (in Krimulda)
The Livonian Rhymed Chronicle is a chronicle written in Middle High German by an anonymous author. It covers the period 1180 to 1343 and contains a wealth of detail about Livonia.
Page 1r of the Codex Palatinus Germanicus 367, showing the opening lines of the Livonian Rhymed Chronicle