Birth of Frederick II
Frederick of Hohenstaufen, later Frederick II, was born on 26 December 1194 in Iesi, near Ancona, Italy, the son of the Emperor Henry VI. He was crowned Holy Roman Emperor Frederick II in 1220. He was one of the most powerful Emperors. He was an influential supporter of science and the arts. He died on 13 December 1250.
You can find the Encyclopaedia Britannica entry on Frederick II here.