October 1600

Friday 06:

Jacopo Peri's Euridice, the earliest surviving opera, premieres in Florence.

Sunday 08:

San Marino adopts its written constitution.

Saturday 21:

Tokugawa Ieyasu defeats the leaders of rival Japanese clans in the Battle of Sekigahara, which marks the beginning of the Tokugawa shogunate, who in effect rule Japan until the mid-Nineteenth century.