Columbia subject headings:
Hydraulic organ.
Jakob, Friedrich.
Organ (Musical instrument)--Switzerland--Avenches.
Harvard subject headings:
Hydraulic organ.
Organ (Musical instrument)--Switzerland--Avenches.
Princeton subject headings:
Avenches (Switzerland)--Antiquities, Roman.
Musical instruments, Ancient--Rome.
Organ (Musical instrument) in art.
Organ (Musical instrument)--Switzerland--Avenches.