The works continued to play an enormous role in providing high-quality iron to fuel the voracious appetite of the Industrial Revolution, with the Tsar of Russia sending a representative to view the production of iron rail. G. Childs, Dowlais (world’s largest) Ironworks, Merthyr Tydfil – 1840 Merthyr Tydfil’s tourism success story is continuing apace, with the sector having a £100m economic impact locally in 2018 – an increase of almost £30m from the previous year. Great Britain was involved in various naval conflicts during this time around the British Empire, and the demand for cannon and other weapons was great. It was also during this period that Crawshay had built a home, which became known as Cyfarthfa Castle.