The Charles Rennie Mackintosh Society encourages greater awareness of the work of Mackintosh as an architect, artist and designer. The rediscovery of Mackintosh as a significant figure in design has been attributed to the designation of Glasgow as European City of Culture in 1990, and exhibition of his work which accompanied the year-long festival. His enduring popularity since has been fuelled by further exhibitions and books and memorabilia which have illustrated aspects of his life and work. The revival of public interest has led to the refurbishment and opening of more buildings to the public, such as the Willow Tea Rooms in Glasgow and 78 Derngate in Northampton. From the 1990s onwards the Scottish artist Stewart Bowman Johnson, who studied in the Mackintosh building at Glasgow School of Art, produced a series of interpretations of the architect's work including works depicting the doors and windows of the Willow tearooms.