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This was followed by a series of books of the same type: City (1974), on the construction of Verbonia, a fictitious but typical Roman city; Pyramid (1975), on the building of monuments to the Egyptian Pharaohs; Castle (1977), on the construction of Aberwyvern castle, a fictitious but typical medieval castle; Mill (1983), on the evolution of New England mills; and Mosque (2003), which depicts the design and construction of an Ottoman-style masjid.