Exhibition of work by Hans von Aachen begins at Prague Castle

An exhibition of the work of German artist Hans von Aachen gets underway at Prague Castle on Tuesday. One of the highlights of the travelling show is a portrait, believed to be from 1605, of the Holy Roman emperor and king of Bohemia Rudolph II. Von Aachen served as a court painter and art buyer for the Hapsburg monarch in Prague at the start of the 17th century.