The oldest commercial art gallery in the world, print sellers to the Prince Regent, and pioneers of photographic publishing, Colnaghi have sold some of the most important Old Master works to come on the market to private collectors and museums across the world. In celebration of their 250th anniversary, they are producing a commemorative catalogue, which traces the history of the gallery from its foundation in 1760 by the enterprising fireworks manufacturer Giavanni Battista Torre.