This study focuses on the work of one of the main Portuguese painters from the 16th century, Vasco Fernandes also known as Grão Vasco.For comparative purposes, are addressed in this paper the following paintings attributed to Vasco Fernandes, using different criteria: the São Pedro (awarded in 1607 by Luis Pereira, minister of Viseu’s cathedral), the Tríptico de Cook (signed), the Assunção da Virgem (given alon...