The world that shaped Europe's first national sculptor-celebrities, from Schadow to David d'Angers, from Flaxman to Gibson, from Canova to Thorvaldsen, was the city of Rome. Until around 1800, the Holy See effectively served as Europe's cultural capital, and Roman sculptors found themselves at the intersection of the Italian marble trade, Grand Tour expenditure, the cult of the classical male nude, and the Enlightenment republic of letters. Two sets of visitors to Rome, the David circle and the British traveler, have tended to dominate Rome's image as an open artistic hub, while the lively...