Mary, Mediatrix of grace

"THERE is no reason why creatures should not be called mediators after a fashion, in that they co-operate in our reconciliation, disposing and ministering to men's union with God."

~St. Thomas Aquinas: S.T. III, q. 26, a. 1.

Mediatrix of All Graces

La Madonna del Popolo, by Federico Fiori Barocci. 

Oil on panel, 1575-79; Galleria degli Uffizi, Florence.