 As early as 1775, noted architect Robert Adam joined with the Scottish Carron Company iron works to produce balcony railings in imitation of wrought iron, such as the railing for the Adelphi in London (a pattern that was still produced into the 1830s).Another very early large scale example is the delicate fence of the Summer Garden in St Petersburg, designed by Georg Von Veldten, built between 1771-1784, which also imitated wrought iron, and is considered the pinnacle of cast iron design in the city.Other well known architects were early adopters of the material; John Nash employed cast iron as part of the structure of his landmark 1820s Royal Pavilion in Brighton, and German architect Karl Friedrich Schinkel was an enthusiastic early adopter, using cast iron for memorials such as the 20m tall Gothic Revival Kreuzberg War Memorial in 1821, and the delightful nautical seahorses and mermaids in the balustrade of the 1820s Castle Bridge in Berlin.