João Pedro Xavier
University of Porto
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Featured researches published by João Pedro Xavier.
Archive | 2015
João Pedro Xavier
Antonio Rodrigues’s Onze Mil Virgens Chapel (ca. 1565) at Alcacer do Sal is a classic temple built as a mausoleum. Here we are able to discern the omnipresence of geometry, always in association with number. Although this temple is tied to a pre-existing one, it has a rigorous geometric plan based on the square, detected at different scales. An ad quadratum geometry is almost always present in the definition of the general proportions of the Chapel, as the side of the squared modular piers and pilasters and its diagonal are related with the measures of the whole. Other clearly discernable proportions are 5:4 and 7:6. The use of the 5:4 rectangle is related to the height of the celestial pole at Alcacer, evidence of Rodrigues’s “scientific inclination”. Further, the geometry is used to propose a hypothesis for a possible design of the main facade, one of the most puzzling aspects of this temple.
Archive | 2015
João Pedro Xavier
The significance of the Liuro de Perspectiva (Book of Perspective), attributed to Antonio Rodrigues, lies mainly in the introduction of an innovative perspective rule designed to solve questions raised by the propagation of inaccuracies and insufficiencies of previous methods. However, the author’s scientific limitations prevented him from fully understanding the enormous potential of his geometrically accurate construction. Decoding and verifying the validity of this peculiar perspective rule leads to the center of the debate surrounding the origins of perspectiva artificialis. Rodrigues’s work demonstrates a striking fidelity to central perspective, especially obvious in one centrally-planned composition with ad quadratum and ad circulum geometry. Rodrigues’s own Onze Mil Virgens Chapel, built some time before 1565 in Alcacer do Sal is a prime example of these concepts.
Nexus Network Journal | 2005
João Pedro Xavier
No Abstract.
Nexus Network Journal | 2002
João Pedro Xavier
Abstract.No abstract.
Nexus Network Journal | 2013
Eliana Manuel Pinho; João Pedro Xavier
Nexus Network Journal | 2014
Kim Williams; João Pedro Xavier
Proceedings of Bridges 2011: Mathematics, Music, Art, Architecture, Culture | 2011
João Pedro Xavier; Eliana Manuel Pinho
Nexus Network Journal | 2011
Kim Williams; João Nuno Tavares; João Pedro Xavier
Nexus Network Journal | 2017
João Pedro Xavier
Archive | 2016
João Pedro Xavier; João Cabeleira