Today Importance - 20th June
1155 Pope Adrian IV crowns Frederick I Barbarossa Holy Roman Emperor at St Peter's Basilica, Rome
1178 Five monks at Canterbury report something exploding on the moon shortly after sunset (only known observation)
1264 The Parliament of Ireland meets at Castle Dermot in County Kildare, the first definitively known meeting of this Irish legislature
1316 Peace of Fexhe signed by Prince-Bishop Adolph II of Mark, limiting his powers
1538 Truce of Nice signed between Holy Roman Emperor Charles V and French King Francis I ending the Italian War of 1536-38
1542 Crown of Ireland Act 1542 passed by the Parliament of Ireland, gives English King Henry VIII the title "King of Ireland"
1574 Polish King Hendrik of Anjou secretly leaves Poland
1580 States of Utrecht forbid Catholic worship
1629 Sea battle at Dungeness: Piet Heyn beats the Dunkirkers, commerce raiders in the service of the Spanish Monarchy
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