Astrolabe and armillary sphere, Urbino studiolo. Leonardo da Vinci states that “practice should always be based upon a sound knowledge of theory, of which perspective – wherein is found the glory not only of mathematical but also of physical science – is the guide and gateway” (cited by Winternitz, “Quattrocento Science in the Gubbio Study,” 111).

From Architecture and memory: the Renaissance studioli of Federico de Montefeltro by Robert Kirkbride

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  • Architectural History
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  • Fig. 1.4. Astrolabe and armillary sphere, Urbino studiolo. Leonardo da Vinci states that “practice should always be based upon a sound knowledge of theory, of which perspective – wherein is found the glory not only of mathematical but also of physical science – is the guide and gateway” (cited by Winternitz, “Quattrocento Science in the Gubbio Study,” 111).