 In Saint Petersburg, cast iron was used on the many bridges, sometimes as the supporting structure, but especially for the decorative railings and sculptural embellishments, including the chain-suspension 1826 Bank Bridge, with its distinctive cast iron griffin sculptures and elaborate balustrades, the 1840 Pevchesky Bridge, the 1842 Anichkov Bridge (a copy of the Berlin Castle Bridge), and more seahorses on the 1843-1850 Annunciation Bridge.Since it could be used for all the structural members that would be cast in a foundry and then transported to site for erection, it was soon realised it could just as easily be transported anywhere in the world.The Commissioner's House of the Royal Naval Dockyard, Bermuda designed by Edward Holl and built in the 1820s, is considered to be the first residence that used cast iron structure, for the verandahs, and floor and roof framing, and proved the concept of prefabrication and transportation long distances.