Upon his return to Denmark in 1838, Thorvaldsen was received as a national hero. The Thorvaldsen Museum was erected to house his works next to Christiansborg Palace. Thorvaldsen is buried within the courtyard of the museum. In his time, he was seen as the successor of master sculptor Antonio Canova. His strict adherence to classical norms has tended to alienate modern audiences. Among his more famous public monuments are the statues of Nicolaus Copernicus and Józef Poniatowski in Warsaw; the statue of Maximilian I in Munich; and the tomb monument of Pope Pius VII, the only work by a non-Catholic in St. Peter's Basilica.