 This was the case for a hundred years, until Germany's defeat in the First World War, when the Grand Duchy of Hesse-Darmstadt was dissolved.Thereafter the region of Rhenish Hesse belonged to the People's State of Hesse, which existed until 1945.After the Federal Republic of Germany was founded in the wake of the Second World War, Welgesheim belonged to the newly founded state of Rhineland-Palatinate ("Rheinland-Pfalz"), and, now also lying within the district of Mainz-Bingen, it still does.