1217 – Second Battle of Lincoln fought near Lincoln, England, resulting in the defeat of Prince Louis of France by William Marshal, 2nd Earl of Pembroke
1293 – King Sancho IV of Castile creates the Study of General Schools of Alcalá
1961 – White mob attacks “Freedom Riders” in Montgomery, Alabama
1970 – Beatles’ “Let it Be” movie premieres in UK
1978 – US launches Pioneer Venus 1; produces 1st global radar map of Venus
1983 – Michael Dokes and Mike Weaver fight to a draw in 15 for heavyweight boxing title
1991 – Chicago Bull Michael Jordan, named NBA’s MVP
1995 – Twins Marty Cordova ties rookie record of HRs in 5 consecutive games
1997 – US President Clinton signs an executive order barring new US investment in Burma (also known as Myanmar), effective May 21 and renewable annually
2007 – 53rd British Academy Television Awards: “That Mitchell and Webb Look” Best Comedy, “The Street” Best Drama