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Naturtheater Grötzingen
Naturtheater
Grötzingen
is a
sylvan theatre
in Grötzingen,
Baden-Württemberg, Germany
. It is a
thin
concrete shell
built in
1954
and
seats
an
audience
of
850
. It was
designed
by
architect
Michael
Balz
and
structural engineer
Heinz Isler
.