 Notwithstanding these precautions, two devastating fires in the 1750s destroyed large parts of the buildings on the ridges.Some of the structures built following these fires are today, together with Djurgårdsstaden, the best preserved 18th century neighbourhoods in Stockholm.To the straight boulevards proposed by his predecessors, Carlberg added new squares and open spaces surrounded by uniformly designed façades with colours limited to various shades of yellow and grey — still a characteristic of large parts of Stockholm.