What happened 1720 AD

The Great Plague of Marseille kills more than 100,000 people in the French city of Marseille.

On 7 July 1720, while Bach was away in Carlsbad with Prince Leopold, Bach's wife suddenly died.

Anitta was succeeded by Zuzzu (r. 1720–1710 BC); but sometime in 1710–1705 BC, Kanesh was destroyed, taking the long-established Assyrian merchant trading system with it. A Kussaran noble family survived to contest the Zalpuwan/Hattusan family, though whether these were of the direct line of Anitta is uncertain.

A king called Adasi (1720–1701 BC) finally restored strength and stability to Assyria, ending the civil unrest that had followed the ejection of the Babylonians and Amorites, founding the new Adaside Dynasty.

The American land owner, Frederick Philipse III, was born in New York City.

The painter and engraver Charles-Dominique-Joseph Eisen was born in Valenciennes, France.