Gaspard Dughet and Pieter Mulier II (nicknamed "Cavalier Tempesta"). Other rooms were frescoed in the 18th century by Pompeo Batoni and Pietro Bianchi. The older wing of the complex, now known as Princess Isabelle's apartments, but once housing Martin V's library and palace, contains frescoes by Pinturicchio, Antonio Tempesta, Crescenzio Onofri, Giacinto Gimignani, and Carlo Cesi. It also contains a collection of landscapes and genre scenes by painters like Gaspard Dughet, Caspar Van Wittel (Vanvitelli), and Jan Brueghel the Elder. Along with the possessions of the Doria-Pamphilij and Pallavicini-Rospigliosi families, this is one of the largest private art collections in Rome. In popular culture The ending scene from the 1953 classic film Roman Holiday, starring Audrey Hepburn and Gregory Peck, was shot at the gallery. External links Palazzo Colonna website Rome Art Lover website Art museums and galleries in Rome Colonna Baroque palaces in Italy Colonna family History of Rome Houses completed in the 13th century Palaces in Rome Private collections in Italy Rome R. II Trevi