St. Lambert is a Christian saint and martyr, known for his role as the Bishop of Maastricht in the 7th century. He is celebrated for his dedication to spreading Christianity in the region that is now Belgium and the Netherlands. St. Lambert was killed in 705 AD, and his life is often associated with themes of faith and perseverance. His feast day is observed on September 17, and he is the patron saint of various places, including the city of Liège. St. Lambert is often depicted in art holding a bishop's staff and a model of a church, symbolizing his ecclesiastical authority and commitment to his faith.