Enrique I el Pajarero
In 16th-century German historiography, the setting down of the first tournament laws is attributed to Henry the Fowler (r. 919–936); this tradition is cited by Georg Rüxner in his "Thurnierbuch" of c. 1530 as well as by Paulus Hector Mair in his "De Arte Athletica" (c. 1544/5).