 Later, Welgesheim belonged to the lordly domain of the Elector of the Palatinate, with whom the place remained until the late 18th century.Under Napoleon, Welgesheim belonged as part of the department of Mont-Tonnerre (Donnersberg) from 1801 to 1814 to France, with its attendant laws, such as the Napoleonic code.In the wake of the Congress of Vienna in 1814 and 1815, the Rhenish-Hessian area was awarded to Hesse-Darmstadt, thereby likewise putting Welgesheim in the Grand Duchy of Hesse-Darmstadt, which was surrounded by the Bavarian Palatinate in the south, the Prussian Governmental Region of Koblenz in the west and the Duchy of Nassau in the north.