formerly known as Myrtle House, are from the same period, while Barle House, Holly House, The Sycamores and Portugal House are slightly more recent. On Battle Lane is the 18th-century Rookstone House, which was formerly the end house in a row of seven, and The Rookery and its lodge, which were built in the early 19th century. Harford Square is dominated by the construction, in 1817, of Harford House and its accompanying stable block. Just south of the village is the medieval Tun Bridge with three pointed arches including double arch rings, spanning over the river, approached along one of the high pavements that are a feature of the village centre. It has three pointed arches, two of which have double arch rings built in two orders. At its widest point it is wide and in the centre. The two main arches are separated by a sharp cutwater and tapering to above which a string course runs throughout the length of bridge. The bridge is thought to date from the late 15th century and is a Grade II listed building and a Scheduled Ancient Monument (Avon No. 159). The raised pavement and steps are themselves also listed Grade II. Surrounding the village are several historic farmhouses including Dumper's Farmhouse, which dates from the 15th century, and Knole Hill Farmhouse, dated 1763. Schools Chew Magna Primary School won a Becta award for the use of ICT in Practice in 2005 for using the adventure exploration computer game Myst to support literacy and communication. Chew Valley School is the main secondary school (11–18 years) for the valley. It is situated between Chew Magna and Chew Stoke. The latest (2015) Ofsted Inspection Report describes this specialist Performing Arts College as a mixed comprehensive school with 1,160 pupils on roll, including 186 students in the sixth form. It says the school is popular and oversubscribed, and has been successful in gaining a number of national and regional awards. It received a "good" rating overall, down from "outstanding" at the last inspection (2011) Go Zero project Chew Magna is the home of the "Go Zero" project, which promotes education for sustainability at all levels in society, seeking to conserve and make improvements to the environment in the UK and overseas. The four groups within Go Zero are: Transport and Energy (which includes Dragonflyer Mobility, a plan to develop a range of integrated services that offer