Hesse (Hessen) Nobility

Hesse-Darmstadt was a German noble family. When the Hanau-Lichtenberg line was extinguished in 1736 its lands were inherited by Hesse-Darmstadt.

Darmstadt was the residence (capital) of the ruling landgraves (1567–1806) and of the Grand Dukes of Hesse (1806-1918).

A history in English may be found at the Wikipedia article Landgraviate of Hesse-Darmstadt.

Hessen-Darmstadt/Staats- und Adresskalender 1785

Walther, A.F. Briefwechsel der „Grossen Landgräfin“ Caroline von Hessen. 2 volumes. Wien: Wilhelm Braumüller, 1877. Digital images. Google Books. https://play.google.com/store/books/details?id=vjkBAAAAQAAJ : 2014.