NX1-260 General
NX280-410 Study and teaching. Research
NX411-415 Competitions
NX420-430 Exhibitions
NX440-632 History of the arts
NX650-694 Special subjects, characters, persons, religious arts, etc.
NX700-750 Patronage of the arts
NX760-770 Administration of the arts
NX775-777 Voluntarism in the arts
NX798-820 Arts centers and facilities