 Among the most influential "pattern books" containing the model drawings were those made up by Swedish fortifications officer Carl Wijnblad (1702-1768), published in 1755, 1756 and 1766, which were spread widely in Finland as well as in Sweden.A particular significant example is the commandant's house in the "castle courtyard" at the heart of the Sveaborg fortress off Helsinki.Compared to the rest of Europe, the manor houses of Finland are extremely modest in size and architectural refinement.