- 1146 Bernard of Clairvaux preaches his famous sermon in a field at Vézelay, urging the necessity of a Second Crusade. Louis VII is present, and joins the Crusade.
- 1492 Queen Isabella and King Ferdinand of Aragon issue the Alhambra Decree which expels Jews from their Kingdoms of Castile and Aragon
- 1657 English Parliament makes the Humble Petition to Lord Protector Oliver Cromwell offering him the crown: he declines
- 1920 British parliament accepts Irish Home Rule law
Thomas Mundy Peterson of Perth Amboy, New Jersey is the first African American to vote in the US (in a local election on town's charter)
On March 31, 1870