By the middle of the 16th century, many roundels produced in numerous glass workshops in the Low Countries were being imported into England. These were single sheets of circular clear glass painted simply with iron-based black pigment and silver (yellow) stain. The imagery on these roundels were copied from printed engravings. These factors and the lack of any leadwork in its construction meant they were relatively cheap to produce and could thereby be affordable to a wider sector of society. Depending on their subject matter, they were imported for use in windows in smaller religious establishments and domestic settings, such as merchants' house and guild halls.