Flanders is one of the regions and communities of Belgium and also a historical geographical region located in parts of present-day Belgium, France and the Netherlands. The demonym for Flanders is Flemish, while someone from Flanders is a Fleming. Brussels is the capital of Flanders.
An update from 11.2.2014 - Steve from the UK sent me a mail that he has found a matchbox with this beautiful Terrier label in an old house in the UK. He has sent me this photo of his matchbox: