There are 90 Grade II* listed buildings in Sedgemoor. The oldest buildings in the list are Anglo-Saxon and Norman churches, with many more churches and churchyard crosses from the Middle Ages. There are also medieval country houses and the remains of castles. Urban architecture is represented by King Square in Bridgwater. Industrial buildings include Ashton Windmill which was built in the 18th century, on a site which has been the location of a windmill since the medieval period. In Bridgwater the Chandos Glass Cone and Brick Kiln are parts of its industrial history. Related transport structures include Bridgwater railway station and the Telescopic Bridge carrying the railway over the River Parrett. The history of the drainage of the Somerset Levels is on display at the Westonzoyland Pumping Station Museum. One of the first buildings to make extensive use of Portland cement for pre-cast concrete was Castle House in Bridgwater which was built in 1851. Decorative work in Bridgwater is also represented with the inclusion of the Blake Statue and War Memorial.