Boston Archbishop Cardinal Sean O’Malley stopped by the Museum of Fine Arts on Oct. 31 to see the rare religious sculptures featured in the exhibition “Della Robbia: Sculpting With Color in Renaissance Florence.’’ MFA director Matthew Teitelbaum and exhibition curator Marietta Cambareri served as O’Malley’s tour guides during his visit. Pictured: The three in front of Luca Della Robbia’s “The Visitation,’’ a work that dates to around 1445.