Saint Romain of Rouen was a 6th-century bishop known for his role in the early Christian church in Rouen, France. He is celebrated for his efforts in spreading Christianity and establishing the church in the region. His leadership helped to strengthen the faith among the local population. Romain is often associated with various miracles and is venerated as a saint in the Catholic Church. His feast day is observed on January 23. The Rouen Cathedral is dedicated to him, reflecting his significance in the history of the city and its religious heritage.