Domitian was the bishop of Tongeren, in modern-day Belgium. He encouraged the development of polemic against heresy in the early church, and worked to evangelize the Meuse Valley. He is occasionally referred to as the Apostle of the Meuse Valley for his efforts there.
Domitian also constructed churches and hospices in order to care for people spiritually and physically.
He was well known for his generosity, as well as his ability to procure money via fund-raising, a talent that once helped to ease a famine in his bishopric. Domitian"s relics are kept and venerated at Huy, Belgium, the city of which he is now the patron saint.
He is also invoked against fevers.