Marckolsheim (French pronunciation: [maʁkɔlsaim]; German: Markolsheim) is a commune in the Bas-Rhin department in Alsace in north-eastern France.

[3] On the eastern edge of the town the Casemate de Marckolsheim Sud, a Maginot Line fortification left over from the Second World War, has been converted into a small museum.

Approximately 3 kilometres to the east the Rhine has been dammed and a hydro-electric power station installed.

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