Analysis of information sources in references of the Wikipedia article "Louis de Hesse-Darmstadt" in French language version.
« The first two branches united in 1997 of the result of the last prince and princess of Hesse-Darmstadt, who were childless, adopting the current head of the house of Hesse-Cassel, Landgrave Moritz. This took place in 1960, and the death of Margaret ("Peg") von Hessen-Darmstadt in 1997 (Ludwig died in 1968) left Landgrave Moritz as the head of both houses. »
