The early modern period in England (c. 1500–1800) brought on a revival in local glass production. Medieval glass had been limited to the small-scale production of forest glass for window glass and vessels, predominantly in the Weald. The organisation of production evolved from the small-scale family-run glass houses typical of forest glass-making to large monopolies granted by the Crown. The influx of immigrants from Europe brought changes in furnace technology and raw materials, creating a better quality glass. Monastic decrees later banned the use of wood fuel which was then replaced by the less expensive alternative of coal. The development of lead glass in the late 17th century propelled England to the forefront of the glass industry and paved the way for advancements in the Industrial Revolution.