We must lay it to the credit side of Rome that some of its generals could understand Polycleitus and Pheidias, Scopas and Praxiteles, even if they carried their appreciation to the point of robbery. Of all the spoils that Aemilius Paulus brought back from his victories over Perseus, he kept for himself only the library of the King, as a heritage for his children.

–Caesar and Christ, by Will Durant, p. 96

In other words, he didn’t just pick up on ideas, he literally stole the physical books.