It is in the Cotswolds, and the main street is the Fosse Way, although like several other settlements the original village was just off this famous Roman road.
The word "marsh" should not be taken to mean boggy ground. It refers to the town's place in the Marches, or Border regions.
Today it is best known for the Charter Market held along the main street, with its wide grass verge, every Tuesday.
The 16th century Curfew Tower has a list of charges, and includes an old lock-up.
There are several coaching inns, including the Royal White Hart, where Charles I spent the night in 1643.
St. David's Church is Victorian, and stands in an elegant churchyard full of topiary.
There is a fine collection of antique shops and tea shops.