Folly Bridge is a stone bridge over the River Thames carrying the Abingdon Road south from the centre of Oxford, England. It was erected in 1825–27, to designs of a little-known architect, Ebenezer Perry (died 1850), who practised in London. The bridge is in two parts separated by an island. The origin of the name is uncertain although it has been suggested that it originated about 1650 after a tenant of Bacon's study.