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Officials in the German town of Pulheim have temporarily suspended the “homemade gas chamber” art installation by a controversial Spanish artist.

The art installation entitled ‘245 Cubic Meters’ by Spanish artist Santiago Sierra features tubes attached to the exhaust pipes of six cars pumping poisonous gas into a former synagogue, turning it into a gas chamber. Visitors had to wear protective masks in order to enter. (Photo: Santiago Sierra/AFP/Getty Images)

The piece 245 Cubic Meters by Santiago Sierra opened in Pulheim Sunday, showcasing a former Jewish synagogue’s conversion into a makeshift gas chamber.