IOANNES QVARTVS PORTVGALIAE REX (Kunsthistorisches Museum)

Supposed portrait of King John II of Portugal (identified in inscription as "Ioannes Quartus", as he was the fourth king of the Aviz Dynasty) [source says John I, but is incorrect], as first identified by Pedro Batalha Reis (Um Retrato d'El-Rei Dom João II, Lisbon, 1946). Some historians (such as A. H. de Oliveira Marques and Maria Fernanda Gomes da Silva) disagree with this identification.