Madonna in trono con San Giovanni Evangelista e San Gregorio Taumaturgo

Madonna Enthroned with Saint John the Evangelist and Saint Gregory Thaumaturgus (1629), attributed to Guercino, is a sacra conversazione combining the Virgin and Child with two saints. Gregory Thaumaturgus ("the Wonder-Worker"), a third-century bishop known for miraculous powers, was particularly venerated in communities that claimed his intercession. Guercino's treatment reflects his style of 1629, a pivotal year when he was transitioning from his early dramatic manner toward the more refined classicism that would characterize his later decades.

The hierarchical arrangement — Madonna elevated, saints flanking — follows traditional altarpiece conventions that Guercino enlivens through dynamic gestures and warm, naturalistic characterization. The saints' individualized faces suggest portrait studies from life.