Update : Der Spiegel has a photogallery, via trendbeheer

Santiago Sierra's latest project 245 Kubikmeter which involves transforming a former synagogue near Cologne into a gas chamber.

At the Stommeln Synagogue in Pulheim, Germany, the Spanish artist has installed tubes to funnel carbon monoxide into the synagogue from six running cars parked outside. Visitors, who must don gas masks to protect themselves from the toxic exhaust fumes, can enter the site one at a time and stay for only a few minutes in the accompaniment of a fireman.

has been suspended by the town of Pulheim to allow a pause for debate. The project is the latest in a series of public art works at the Stommeln former synagogue since it was transformed into a "Denkmal im Wandel" (Monument in Mutation)in 1990.