Historical Events
- Jan 25 Tsar Peter the Great ends Russian-orthodox patriarchy
- Mar 9 British Chancellor Exchequer John Aislabie confined in London Tower
- Mar 24 Johann Sebastian Bach dedicates his Brandenburg Concertos to Christian Ludwig, Margrave of Brandenburg-Schwedt
- Mar 27 France & Spain sign Treaty of Madrid
- Apr 3 Robert Walpole becomes Britain's 1st Lord of the Treasury - effective Prime Minister, although that term was never officially used (indeed, it was considered an insult) until much later
- May 8 Michelangiolo dei Conti succeeds Pope Clement XI, as Innocent XIII
- May 25 John Copson becomes America's 1st insurance agent
- May 29 South Carolina formally incorporated as a royal colony
- Jun 13 England signs Treaty of Madrid
- Jun 26 Dr Zabdiel Boylston gives 1st smallpox inoculations in America
- More Historical Events
1721 in Music
- Mar 24 Johann Sebastian Bach dedicates his Brandenburg Concertos to Christian Ludwig, Margrave of Brandenburg-Schwedt