Bernardo Tolomei was a 14th-century Italian theologian and priest born in Siena. Before entering religious life, he led a prominent secular existence, serving as a knight for Rudolph I and holding various high-ranking positions within the government of Siena. He also studied law, mathematics, and philosophy, eventually becoming a professor of law at the local university. His life changed when he co-founded the Olivetan Congregation, a religious order following the Rule of St. Benedict, alongside two companions.