PT Journal AU Novak, A TI Ars sine scientia? Practical Geometry of the Medieval Painting SO Pruzkumy pamatek PY 2020 BP 143 EP 156 VL 27 IS 1 DI 10.56112/pp.2020.1.11 WP https://pruzkumypamatek.cz/en/artkey/prp-202001-0011.php DE composition - squaring - triangulation - compasses - diagonal - perspective SN 12121487 AB The ambivalence of the construction order and free imagination are first viewed upon from the perspective of the practical auxiliary geometry - from the squaring and triangulation adopted from architects to the setting of the visual field format. Nevertheless, the author emphasises that the composition of the visual field represents - unlike the mechanical monitoring of golden ratios and further proportional outlines - a system of a higher order, in which the linear outline remains to be just one of the aspects, the initial stage of the work's origin. He further highlights the knowledge of perspective in the High Middle Ages as well as its rejection (unwanted optical shortcuts!) in favour of the 'relative space'. The space is then broken in the visual field on different foundations - an autonomous visual world that also includes the element of play is shaped by an intuitive usage of internal geometric rhythms. ER