Giacomo da Ulma (born c. 1407 in Ulm, died 1491 in Bologna) was a German Dominican lay brother and artist. Before entering the Order of Preachers, he served as a soldier in the Campania region of Italy. After becoming disillusioned with military life, he answered a religious calling and spent his remaining years in Bologna. He is primarily remembered for his artistic contributions, specifically his work as a painter and stained-glass artist creating images for church windows.
Life and career

Born in Swabia, Giacomo traveled to Rome on pilgrimage before enlisting as a soldier in Naples in 1432. Following a period working as an assistant to a solicitor, he joined the Dominican Order in Bologna in 1441. He dedicated his later life to religious art, focusing on painting and glasswork. He passed away in October 1491 and was interred in the Basilica of San Domenico.
Veneration
He is recognized as a blessed in the Catholic tradition. His beatification was officially approved by Pope Leo XII in 1825. His feast day is observed on October 11, the anniversary of his death. His remains were moved to a different chapel within the Basilica of San Domenico in 1965.
