He and the crown princess took a great interest in art and industry, especially in the royal museums; and the excavations conducted at Olympia and Pergamon with such great results were chiefly due to him.
The last excavations at Ephesus, Miletus and Pergamon produced (besides inscriptions) little more than architectural remains of Hellenistic and Roman date.
At Pergamon the Germans cleared two Hellenistic temples, in one of which a broken statue, identified as a portrait of Attalus II., was found.
Ramsay, Letters to the Seven Churches (1904); and especially the publication by the Royal Museum of Berlin, Alterthumer von Pergamon (1885 sqq.); "Operations at Pergamon 1906-1907," in Athenische Mitteil.