Belfast blossomed as a commercial and industrial centre in the 18th and 19th centuries and became Ireland's pre-eminent industrial city. Industries thrived, including linen, rope-making, tobacco, heavy engineering and shipbuilding, and at the end of the 19th century, Belfast briefly overtook Dublin as the largest city in Ireland. The Harland and Wolff shipyards became one of the largest shipbuilders in the world, employing up to 35,000 workers