St Mary's Church is an Anglican Church in the centre of the town of Luton, England. The church has a rich and long history, being over 900 years old and has been rebuilt and refurbished constantly over the centuries. The Church is one of the largest in Bedfordshire and considered a fine example of medieval architecture.The Church is part of the St Albans Diocese. The church is grade-I listed and the only one to be a grade-I listed building in the whole of Luton.