Alessandro Turchi, Agatha of Sicily Cured by Saint Peter in her Prison

Circa 1630-35
Oil on copper
Musée des Beaux-Arts, Strasbourg, France

This image seems to follow the tradition in which the breasts are seen to be restored by Peter and in his presence, rather than after he has vanished and Agatha has said her prayer of thanksgiving.

Ten years later Turchi did this rather more modest painting of the same subject:

Circa 1640-45
Oil on slate
Walters Art Museum

More of St. Agatha
More of St. Peter

Source: First picture Wikimedia Commons, second picture Wikimedia Commons