Professor Piancastelli. (Professor Luigi Grassi [1858-1937], Florence); purchased 18 September 1922 by Joseph E. Widener, Lynnewood Hall, Elkins Park, Pennsylvania; Inheritance from Estate of Peter A.B. Widener by gift through power of appointment of Joseph E. Widener, Elkins Park, Pennsylvania, after purchase by funds of the Estate; gift 1942 to NGA.
- Works of Art from the Widener Collection. Foreword by David Finley and John Walker. National Gallery of Art, Washington, 1942: 17.