Posted on June 24, 2014March 24, 2025 by Julie Christian Flag Facts – Denmark Denmark’s flag is the oldest flag design still in use, as it was designed in the 13th century. The Scandinavian countries all have crosses of different colours on their flags, representing Christianity. Post navigationPrevious post: BBC Radio Somerset and BBC Radio Two – Exmoor Flag Competition LaunchNext post: Exmoor Flag Newsletter No 1