What is the famous protestant church in London?

The famous Protestant church in London is St Paul's Cathedral. It is an Anglican cathedral, the seat of the Bishop of London, and the mother church of the Diocese of London. It sits on Ludgate Hill at the highest point of the City of London and is a Grade I listed building. Its dedication to Paul the Apostle dates back to the original church on this site, founded in AD 604. The present cathedral, designed in the English Baroque style by Sir Christopher Wren, was built in the late 17th and early 18th centuries, replacing the medieval cathedral burned down in the Great Fire of London.