April 18 – History, Events, Births, Deaths, Holidays and Observances On This Day

April 18 in History 796 – King Æthelred I of Northumbria is murdered in Corbridge by a group led by his ealdormen, Ealdred and Wada. The patrician Osbald is crowned, but abdicates within 27 days. 1506 – The cornerstone of the current St. Peter’s Basilica is laid. 1518 – Bona Sforza is crowned as queen consort of Poland.…