St. Lambert of Liège was a 7th-century bishop known for his dedication to the Christian faith and his role in the early church. He served as the bishop of Liège, a city in present-day Belgium, and was recognized for his efforts in spreading Christianity and promoting moral living among his followers. St. Lambert is often remembered for his martyrdom, as he was killed in 705 AD due to political conflicts. His legacy includes the establishment of St. Lambert's Cathedral in Liège, which became a significant religious site. He is venerated as a saint in both the Roman Catholic Church and the Eastern Orthodox Church.