Ancient Greek music comes from actual pieces of musical scores, literary references, and what's left of musical instruments. Although extant musical scores are rare, incomplete, and of relatively old, abundant literary references shed light on the practice of music, its social functions, and its aesthetic qualities. Furthermore, inscriptions share information about the economics and institutional organization of professional musicians, recording such things as prizes awarded and fees paid for services. The archaeological record attests to monuments happened in honor of accomplished musicians and to splendid roofed concert halls. In Athens during the second half of the fifth century B.C., the Odeion (roofed concert hall) of Perikles was erected on the south slope of the Athenian akropolis—physical testimony to the importance of music in Athenian culture.