single span roof construction allowed him to build the new churches without the traditional subdivision into nave and aisles. He served as bridgemaster for both the North and West Ridings of Yorkshire, leaving a legacy of countless bridges the majority of which still stand today. The more than 60 bridges built or altered by Carr still serve the backbone of North Yorkshire's road transport network. Carr was Lord Mayor of York in 1770 and 1785. His commissions for country houses included model villages and farms, stable blocks, a variety of gate lodges and gateways, garden temples and other ornamental buildings. Notable among them his works for the estates of Harewood and Wentworth Woodhouse. He took particular care with their planning and construction to maximise value for money for both the immediate patron and for the buildings' future long-term maintenance. He used traditional materials and methods of construction where these had proved sound, but adopted new methods and materials where these could be shown to have an advantage. His training as a stonemason naturally led him to build in that material. In particular he enjoyed using 'great' stones as at Tabley House. He liked well proportioned rooms which were satisfactory living spaces with or without decorative enrichment. In his view the latter could be provided later if money permitted. As a result, most of his buildings were completed and because of the soundness of construction most survive. Among the buildings accessible in whole or part to the public today are Buxton Crescent, Newark Town Hall, virtually all his bridges, Harewood House, Tabley House, Clifton House (a museum in Rotherham), Lytham Hall and Fairfax House at 27 Castlegate York, now the headquarters of York Civic Trust. Influences During his long career there were several major changes in architectural style. His early work is a mixture of the Palladian and the Rococo. He then sought a purer Antique Roman style with occasional French influences before adapting the currently fashionable style associated with Robert Adam. At the end of his life he returned to the bolder Palladian style of his youth but with detail that looked forward to 19th-century usage. Carr's work was influenced by the books of Sebastiano Serlio and Andrea Palladio. He subscribed to many architectural pattern books, including those of his friend George Richardson, and also contemporary publications by Robert Morris and William Chambers. List of works Public buildings (dem =