Saint Galgano (1148 – 3 December 1181) was a Catholic saint from Tuscany born in Chiusdino, in the modern province of Siena, Italy.
His mother's name was Dionigia, while his father's name (Guido or Guidotto) only appeared in a document dated in the 16th century, when the last name Guidotti was attributed.
The canonization process to declare Galgano a saint started in 1185, only a few years after his death, and his canonization was the first conducted with a formal process by the Roman Church.
A lot of Saint Galgano's life is known through the documents of the canonization process in 1185 and other Vitae: Legenda beati Galgani by anonymous, Legenda beati Galgani confessoris by an unknown Cistercian monk, Leggenda di Sancto Galgano, Vita sancti Galgani de Senis, Vita beati Galgani.