 It stretched along the valley of the River Main from its confluence with the Upper Rhine up to the Bavarian March of the Nordgau, in the areas of the present-day Bavarian region of Franconia, the adjacent southern parts of the Free State of Thuringia, northern Baden-Württemberg (i.e.Rhine-Neckar and Heilbronn-Franken) and Hesse.It also included several "Gaue" on the left bank of the Rhine around the cities of Mainz, Speyer and Worms comprising present-day Rhenish Hesse and the Palatinate region.