Todtnau is a town in the district of Lörrach in Baden-Württemberg, Germany. As of 2009 its population was of 4,932.GeographyIt is situated in the Black Forest, on the river Wiese, 20 km southeast of Freiburg.The municipality counts 8 civil parishes (Ortsteil): 15px Aftersteg 15px Brandenberg15px Geschwend15px Herrenschwand15px Muggenbrunn15px Präg15px Schlechtnau15px TodtnaubergPersonalitiesKarl Nessler, inventor of the permanent wave was born here.Martin Heidegger, had a chalet in Todtnauberg