Di Marzo, followed by Scerrato and Pinder Wilson, suggests the 13th century, thus placing the work in the Federican period. Biagi, however, identifies the origins of the decorative type in the Persian miniature and suggests the 12th century. ###>Di Marzo, de même que Scerrato et Pinder Wilson, proposent une chronologie relative au XIIIe siècle, situant l'œuvre à l'époque de Frédéric II.