Our Lady of Good Counsel (Latin: Mater boni consilii) is a title given to the Blessed Virgin Mary, after a painting said to be miraculous, now found in the thirteenth century Augustinian church at Genazzano, near Rome, Italy.

Measuring 40 to 45 centimetres (16 to 18 in) the image is a fresco executed on a thin layer of plaster no thicker than an egg shell.

In the 5th century, during the reign of Pope Sixtus III, the town of Genazzano, about 48 kilometres (30 mi) south of Rome, had contributed a large portion of its revenue for the Roman basilica now known as Santa Maria Maggiore.

In front of the people, the cloud dissipated and a beautiful fresco, no thicker than a carte-de-visite and no more than eighteen inches square, of the Virgin Mary and the Christ Child was revealed.

They believe the fresco is likely the work of the early fifteenth century artist Gentile da Fabriano, probably painted around the time of Pope Martin V (1417-1431).

In 1939, Venerable Pope Pius XII placed his pontificate under the maternal care of Our Lady of Good Counsel and composed a prayer to her.

On the front panel of the sacramental (to be made of white wool) is the image of the fresco of Our Lady of Good Counsel, with the inscription, "Mater boni consilii [ora pro nobis]."

On the second segment is found the papal coat-of-arms, which includes the Triple Tiara and the Keys of Heaven, with the words of Leo XIII: "Fili acquisce consiliis ejus" (Child, listen to her counsels).