Best known for its turreted castle and late 17th-century streets Warwick is not far from Shakespeare's birthplace at Stratford-upon-Avon. Like Stratford, Warwick is on the river Avon and is a popular tourist draw in the heart of England. The county town of Warwickshire, with a population of just over 20,000, the early music concerts at St mary's church are worth attending, and the nearby Warwick Racecourse is a popular day out during meetings held throughout the year. The local streets' historic features have often been used as backdrops for several television series, including BBC productions of Tom Jones and Pride and Prejudice. The castle itself was founded by William the Conqueror but is based on an earlier Anglo-Saxon construction and lay at the heart of the medieval walled city of Warwick.