From 16/06/2017 to 18/06/2017,  "Ferie delle Messi". Medieval Festival in the heart of Tuscany, through the streets and squares of San Gimignano with markets of medieval arts and crafts. Storytellers, actors and musicians. During the Sunday afternoon: knights parade and tournament. FREE ENTRY. Organized by the Associazione Cavalieri di Santa Fina.
The Knights of Santa Fina re-enact the old "Feriae Messium" tradition on the third Saturday and Sunday of June. These days were once celebrated by the entire population as a festivity that preceded the harvest, and it is now a two-day mediaeval-style festival with costumed knights on horseback, jousts, parades, acrobats, fireworks, musicians, art and crafts market and plenty of good eats.
More info at www.cavalieridisantafina.it