It is known that Goryokaku plan was based on documents sent by a French warship “Constantine” in 1855. It is not clear which book is the original version, but Ayasaburo TAKEDA, designer of Goryokaku referred to a Dutch version of French book, Cours élémentaire de fortification by SAVART, according to the former researches. In fact, any example of whole model plan of the star fort is not contained in this textbook. In this report, it is examined whether TAKEDA based Goryokaku plan on this Cours, by dimensional comparisons between Goryokaku and some examples of figures in this book.
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