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Italiano: Il Ritratto di fra' Luca Pacioli con un allievo (Guidobaldo da Montefeltro?) attribuito a Jacopo de' Barbari, è un quadro (olio su tavola, cm 98 x 108) che si trova a Napoli nel Museo di Capodimonte. L'opera, pur essendo esposta nella Galleria Farnese, non fa parte della Collezione Farnese, trattandosi di un acquisto dello Stato italiano fatto nel 1903-1904.
English: Ritratto di Frà Luca Pacioli (1495). Luca Pacioli (1445–1517) is the central figure in this painting exhibited in the Museo e Gallerie di Capodimonte in Napoli (Italy). The painter is unknown, although some people are convinced the painter is Jacopo de' Barbari (1440–1515). It shows Pacioli standing behind a table and wearing the habit of a member of the Franciscan order. He draws a construction on a board, the edge of which bears the name Euclides. His left hand rests upon a page of an open book. This book may be his Summa de Arithmetica, Geometria, Proportioni et Proportionalità or a copy of Euclid. Upon the table rest the instruments of a mathematician: a sponge, a protractor, a pen, a case, a piece of chalk, and compasses. In the right corner of the table there is a dodecahedron resting upon a book bearing Pacioli's initials. An rhombicuboctahedron (a convex solid consisting of 18 squares and 8 triangles) suspends at the left of the painting. The identity of the young man at the right is uncertain, but one commentator recognizes the “eternal student" instructed by Pacioli. Some authors have also mentioned the possibility that the student is Durer.
Date 1495
Medium painting
Source/Photographer Lauwers, Luc & Willekens, Marleen: Five Hundred Years of Bookkeeping: A Portrait of Luca Pacioli (Tijdschrift voor Economie en Management), Katholieke Universiteit Leuven, 1994, vol. XXXIX issue 3 p. 289–304)


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