1343

January–December

• January 14 - Arnošt of Pardubice becomes the last bishop of Prague and, subsequently, the first Archbishop of Prague.
• January 27 - Pope Clement VI issues his bill Unigenitus, defining the doctrine of "The Treasury of Merits" or "The Treasury of the Church" as the basis for the issuance of indulgences by the Catholic Church.
• April 23 - The St. George's Night Uprising begins in Estonia.
• May 4 - St. George's Night Uprising: The "Four Estonian kings" are murdered, at the negotiations with the Livonian Order.
• August 15 - Magnus IV of Sweden abdicates from the throne of Norway, in favor of his son Haakon VI of Norway. However, Haakon is still a minor, allowing Magnus to remain de facto ruler.
• August 31 - A naval league is formed between the Pope, the Republic of Venice, the Knights Hospitaller and the Kingdom of Cyprus, to prepare the Smyrniote Crusades.
• November 25 - A tsunami, caused by an earthquake, devastates the Maritime Republic of Amalfi, among other places.