Deaths on May 20

Sébastien Vaillant, French botanist and mycologist (b. 1669)

Sébastien Vaillant (May 26, 1669 – May 20, 1722) was French botanist who was born at Vigny in present-day Val d'Oise.

8 Mar

Battle of Gulnabad
The Safavid Empire of Iran is defeated by an army from Afghanistan at the Battle of Gulnabad, pushing Iran into anarchy.
5 Apr

Easter Island
The Dutch explorer Jacob Roggeveen discovers Easter Island.