The firm of James Powell and Sons, also known as Whitefriars Glass, were London-based English glassmakers, leadlighters and stained-glass window manufacturers. As Whitefriars Glass, the company existed from the 17th century, but became well known as a result of the 19th-century Gothic Revival and the demand for stained glass windows, mostly for churches. It continued to make art glass into the 20th century, before finally closing production in 1980.