Joachim of Fiore was a 12th-century Italian theologian and abbot who founded the monastic community of San Giovanni in Fiore. Born in Celico, he transitioned from a legal career to a life of religious devotion following a spiritual conversion during a pilgrimage to the Holy Land. He is most recognized for his apocalyptic theories regarding the three ages of history, which posited a future era of the Holy Spirit characterized by universal love and spiritual contemplation. His eschatological ideas profoundly influenced medieval thought and inspired later thinkers, including Dante Alighieri.