Detail of St. Jerome and a Canon Praying by Simon… Etant Donnes by Duchamp in the Philadelphia Museum… Etant Donnes by Duchamp in the Philadelphia Museum… Detail of Etant Donnes by Duchamp in the Philadelp… Detail of the Portrait of Camille Roulin by Van Go… Portrait of Camille Roulin by Van Gogh in the Phil… Manne-Portre Etretat by Monet in the Philadelphia… Earthenware Virgin and Child in the Philadelphia M… Nero and Poppea on Horseback by Isaia da Pisa in t… Detail of a Pinnacle from an Altarpiece with Dead… Rachel Weeping by Charles Willson Peale in the Phi… Avenue de l'Opera: Morning Sunshine by Pissarro in… Spanish Woman by Courbet in the Philadelphia Museu… The Opening by Cheret in the Philadelphia Museum o… La Premiere Pose by Howard Roberts in the Philadel… Detail of La Premiere Pose by Howard Roberts in th… Detail of La Premiere Pose by Howard Roberts in th… Detail of La Premiere Pose by Howard Roberts in th… Detail of La Premiere Pose by Howard Roberts in th… The Lost Pleiad by Randolph Rogers in the Philadel… Detail of The Lost Pleiad by Randolph Rogers in th… Detail of Arab Chief by Mariano Fortuny in the Phi… Steamboat: Seascape with Porpoises by Manet in the… St. Jerome and a Canon Praying by Simon Marmion in… Detail of Chinese Musicians on Horseback in the Ph… Chinese Musicians on Horseback in the Philadelphia… The Forum of Trajan in Rome, June 2014 The Forum of Trajan in Rome, June 2014 The Auditorium of Maecenas in Rome, June 2014 The Auditorium of Maecenas in Rome, June 2014 The Porticus Octaviae and the Theatre of Marcellus… The Porticus Octaviae and the Theatre of Marcellus… The Porticus Octaviae and the Theatre of Marcellus… The Porticus Octaviae and the Theatre of Marcellus… The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 The Porticus Octaviae in Rome, June 2012 Detail of the Porticus Octaviae in Rome, June 2012 Twin Churches in Piazza del Popolo in Rome, June 2… Detail of the Mosaic in the Apse of Santa Maria in… Detail of the Mosaic in the Apse of Santa Maria in…