From the 14th through the 18th century the grazing of the Cotswold breed of sheep (now nearly extinct) brought great prosperity to the wool traders and cloth merchants of the district; this former prosperity is still evident in the churches and other buildings that grace the villages and market towns strung along the lower easterly edge of the undulating tableland of the Cotswolds. Among the district's villages and towns are Bourton-on-the-Water, Stow-on-the-Wold, Bibury, Lower Slaughter, and Northleach in the central part of the district, Chipping Campden in the north, and Cirencester, the district seat, in the south. Old homes in these towns were often built of the local limestone and have gabled roofs of stone or tile. Market halls, Tudor houses, and churches, particularly of the Perpendicular Gothic architectural style of the 14th–16th centuries, reflect the district's former wealth; the 28 painted glass windows from the 15th–16th centuries in the parish church of St. Mary at Fairford, 8 miles (13 km) east of Cirencester, were designed by Flemish artisans and are excellent examples of the period.