Portrait of gregory xii (as gregory i the great). Object Type: painting. Date: between circa 1473 and circa 1476. Dimensions: height: 115 cm (45.2 in); width: 68 cm (26.7 in). Medium: oil on panel. Depicted People: Gregorius XII. Collection: Galleria Nazionale delle Marche. Gregorio Incaelum Relato (San Gregorio Magno) - Studiolo di Federico da Montefeltro
