Blue StarShip/UFO Report - September 15, 2012 [1]

 

This painting is called "The Madonna with Saint Giovannino". It was painted in the 15th century. The Palazzo Vecchio [2] lists the artist as unknown although attributed to the Lippi school.Above Mary's right shoulder is a disk shaped object. Below is a blow up of this section and a man and his dog can clearly be seen looking up at the object.
Source: alien-ufo-pictures.com. [3]