Attributed to Fray Alonso de Zamora, called Maestro de Oña

Anonymous sale, New York, Sotheby's, 28 May 1999, lot 30 (as "School of Burgos");
Where purchased by the present collector. 

The thick wood panel is uncradled and has four wood battens affixed to the reverse. overall the paint surface has been well preserved, with thick impasto and very nice retention of detail. some scuffing at upper edge. there are two horizontal cracks at right, from right edge extending over to shoulder of saint. some areas of lifting that have been laid down can be seen in area below sleeve and left hand of saint, in dark area of drapery at bottom, and in lower left background. these all appear to be stable. there are some raised areas that give the surface a somewhat uneven surface, and these are probably due to various knots in the wood panel. under ultraviolet light, one can see retouches of varying size scattered throughout. most are in the form of very small retouches on saint's white drapery and flesh tones of his face. a larger area of retouching can be seen at lower right above demon's head. In a gilt wood frame.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective qualified opinion.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.

Fray Alonso de Zamora led an active workshop at a monastery in the city of Burgos in the late 15th and early 16th centuries.  Burgos, situated along the River Arlazón in Northern Spain, had a thriving wool trade that grew dominant due to privileges received in the late 15th century by the Catholic monarchs, Ferdinand and Isabella.  This prosperity encouraged business, the arts, and the importing of goods from countries to the north, particularly Flanders.

Notable works by the artist include a set of eight paintings on canvas, depicting the Passion of Christ, in the monastery of San Salvador de Oña (painted circa 1500-1510), and an altarpiece formerly of the monastery of San Pedro de Tejada, now in the Museo de Burgos, depicting nine scenes from the life of Saint Peter, painted circa 1503-1506.