The first narrow boats played a key part in the economic changes of the British Industrial Revolution. They were wooden boats drawn by a horse walking on the canal towpath led by a crew member. Horses were gradually replaced with steam and then diesel engines. By the end of the 19th century it was common practice to paint roses and castles on narrowboats and their fixtures and fittings. This tradition has continued into the 21st century, but not all narrowboats have such decorations.