The first representations of the walls, made between the construction and the completion of the perimeter ring, provide information on the evolution of the project or the general layout of the city, regardless of the geometric accuracy of the representations.
G. B. Belluzzi, copy of a primitive project by Sabbioneta pentagonale, Florence, Biblioteca Nazionale, in Gianfranco Ferlisi, Sabbioneta, città murata, published in Costruire, abitare, pensare. Sabbioneta e Charleville. Città ideali dei Gonzaga, edited by Carlo Bertelli, Universitas studiorum 2017, Mantova. P. 98.
S. Smeraldi, “Sabioneta del sig. Duca Vespasiano Gonzaga”, part of the map entitled “Il corso del Po nel territorio farnesiano”, Parma 1605 (ASPr, Raccolta Mappe e Disegni, vol. 66, n. 314).
“Sabbioneta a volo d’uccello”, by Eng. Smeraldo Smeraldi, is a city depicted in ideal terms, in the shape of a regular hexagon and with the castle not integrated in the curtain wall between the bastions of San Francesco and Santa Maria.
