From Rome he was also able to further the work of other American archaeologists in Italy and Yugoslavia, as well as the corpus of Roman mosaics in North Africa and the international project to safeguard the Punic and Roman antiquities of Carthage. While Director of the Academy, he was also President of the International Union of the Institutes of Archaeology, History, and the History of Art in Rome in 1966-1967, and he was active in the affairs of the International Association for Classical Archaeology throughout his years in Rome.