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Subclass NX
| NX1-820 | Arts in general | |
| 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 | |
