Historical Events
- Apr 4 Battle at Postage Farina, Tunis: English fleet defeats Barbary pirates
- Apr 4 The miraculous statue entitled the Infant of Prague is solemnly crowned by command of Cardinal Harrach
Alexander VII
Apr 7 Fabio Chigi replaces Pope Innocent X as Pope Alexander VII
- Apr 19 Adriana Nooseman becomes Dutch 1st actress to perform on stage professionally in the Netherlands in the play "Onvergelijkelijke Ariana" at Amsterdam Schouwburg
- Apr 24 Piedmontese Easter Massacre: Troops of Charles Emmanuel II, Duke of Savoy, slaughter upwards of 4,000 Waldensian civilians for non-compliance with the Edict of 25 January 1655, which called for the expulsion or conversion of non-Catholic householders in Piedmont, Duchy of Savoy
- Apr 26 Dutch West Indies Company denies Peter Stuyvesant's desire to exclude Jews from New Amsterdam colony
- Apr 28 English General-at-Sea Robert Blake (he was never titled Admiral) beats North African pirate fleet
Famous Birthdays
- Apr 8 Louis Willem I, Margrave of Baden-Baden, born in Paris (d. 1707)