317 - Crispus and Constantine II, sons of Roman Emperor Constantine I, and Licinius Iunior, son of Emperor Licinius, are made Caesares 1457 - The Unitas Fratrum is established in the village of Kunvald, on the Bohemian-Moravian borderland.. 
1949) 1871 - ben Harney, American composer and ragtime pianist (d.. 