The picture shows fol. 17v of Manuscript B.
It has been proposed that the central plan designs in Manuscript B were originally to be used in a collection of architectural plans. In addition to ground plans and elevations common until then, there are mainly aerial perspectival views, which were a novelty in the field of architectural drawing. However, Vitruvius had already introduced them as a third form of architectural depiction in "De Architectura", his ten books on architecture.
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