Columbia subject headings:
Essen (Germany)--Buildings, structures, etc.
Grillo-Theater (Essen, Germany)
Theater--Germany--Essen--History.
Harvard subject headings:
Essen (Germany)--Buildings, structures, etc.
Grillo-Theater (Essen, Germany)
Theater--Germany--Essen--History.
Princeton subject headings:
Essen (Germany)--Buildings, structures, etc.
Grillo-Theater (Essen, Germany)
Theater--Germany--Essen--History.