Outside the city of Bath most of the Grade I listed buildings are Norman- or medieval @-@ era churches . Manor houses such as Claverton Manor , which now house the American Museum in Britain , and the 18th @-@ century Newton Park , which have a landscape garden designed by Capability Brown , also appear in the list ; Newton Park now form part of the Bath Spa University . The most recent building is the agricultural Eastwood Manor Farm Steading , completed in 1860 .