Annunciation and Nativity
Francesco del Cossa,1470
Détrempe sur bois, 137 x 113 cm, and 26,5 x 114,5 cm
The main panel and the predella formed the altarpiece of the church of Observation in Bologna. At both sides of the predella there were two small paintings representing St Clare and St Catherine of Alexandria, presently both in the Thyssen collection in Madrid.
The altarpiece was attributed to Mantegna until the end of the 19th century.