St. Grégoire's chapel is located in the hamlet of Mauchen, to the south of Marckolsheim. Built in 1246, it is the only remaining trace of the village of Mauchenheim, which was first recorded in writing in the year 777. This village, which once had between 200 and 250 inhabitants, disappeared between 1200 and 1300 following a series of pillages, invasions, Rhine floods and outbreaks of plague. A reconstruction of the 18th-century frescoes, outlining part of Genesis, can be seen above the chapel's entrance.
Mauchen, 67390 Marckolsheim