From Wikipedia, the free encyclopedia.
The Prussian province of Hesse-Nassau was created in 1866 by combining the previously independent Landgraviate of Hesse-Homburg, electorate of Hesse-Kassel, duchy of Nassau, and the free city of Frankfurt.
After the Second world war it merged with the neighbouring Landgraviate of Hesse-Darmstadt into the German state of Hesse.
