The artist was named by Post (op. cit., pp.443-69) the 'Master of Almudévar' after two retables in the Ermita de Sto. Domingo at Almudévar, near Huesca in Aragon, one of which bears an inscription stating that they were finished on 27 March 1498. Many other works by the same hand, including the present panel, are known to come from, or remain in, the province of Huesca, and Post subsequently identified him as Juan de la Abadía, documented in Huesca 1493-1513. The artist's style is, however, strongly Catalan, his embossed gold backgrounds being unique in Aragon. The sun pattern of that of the present picture is also found in a panel of 'The Madonna and Child with Saint Anne', said to come from Sijena, formerly in the same collection at Palm Beach.

Saint Michael is depicted wearing the order of Calatrava. Saint Engracia was a virgin martyr whose worship is peculiar to Aragon