Roman Emperor Caracalla is assassinated. He is succeeded by his Praetorian Guard prefect, Marcus Opellius Macrinus.
Apr 8, 1275
in Syria, sultan Baibars conquers the Krak des Chevaliers.
Apr 8, 1541
1541 – Michele Mercati, Italian physician and archaeologist
English colonial patents are granted for the establishment of the Monmouth Tract, for what would eventually become Monmouth County in northeastern New Jersey.
Shearith israel, the first synagogue in New York City, is dedicated.
Pablo Picasso, Spanish painter and sculptor
A Royal Canadian Air Force Canadair Harvard collides with a Trans-Canada Airlines Canadair North Star over Moose Jaw, Saskatchewan, killing 37 people.
BOAC Flight 712 catches fire shortly after take off. As a result of her actions in the accident, Barbara Jane Harrison is awarded a posthumous George Cross, the only GC awarded to a woman in peacetime.
Haryana Gana Parishad, a political party in the Indian state of Haryana, merges with the Indian National Congress.