The four

The most prominent members of the late 19th and early 20th century modernist movement known as the Glasgow School, they were Margaret MacDonald, painter and glass artist; Charles Rennie Mackintosh, architect; and painters Francis and Herbert MacNair. It is written that these four defined the Glasgow Style, a modern art that combined influences of Celtic Revival, Arts and Crafts Movement and Japonisme, and had a great impact on the definition of Art Nouveau. (Also, see Glasgow School) Source: Wikipedia, http://en.wikipedia.org/wiki/Glasgow_School