The Collegiate Church of Saint Gertrude is a historic church located in the city of Nivelles, Belgium. It was founded in the 11th century and is dedicated to Saint Gertrude of Nivelles, a prominent figure in the region's religious history. The church is known for its impressive Romanesque architecture and beautiful stained glass windows. The church serves as a significant cultural and religious site, attracting visitors interested in its rich history and architectural beauty. It is also a place of worship for the local community, hosting various religious services and events throughout the year.