Study for St. William of Aquitaine

Study for Saint William of Aquitaine (c. 1629), in the Rhode Island School of Design Museum, is a preparatory work for Guercino's painting of the medieval duke-turned-monk — providing insight into the artist's working process. Such oil studies reveal how Guercino developed his compositions, experimenting with pose, lighting, and expression before committing to the final painting. The RISD Museum's European collection includes Italian Baroque works acquired through the school's educational mission, providing students with direct access to the painting traditions they study.

The study's loose, rapid brushwork captures the essential composition and light effects without the finish of the final altarpiece. Guercino's ability to establish a convincing figure and setting with minimal strokes demonstrates his exceptional fluency as a painter.