The Grafen von Falkenstein was a dynasty of German nobility descending from the Ministeriales of Bolanden, who held land and a castle at Falkenstein in the Palatinate region. Philipp IV of Bolanden, a treasurer to the Emperor and guardian of the Imperial Regalia at Trifels Castle, was the founder of the Falkenstein line. He married Isengard, heiress of the County of Hagen-Münzenberg in the Wetterau, and took his residence at Falkenstein Castle. Philipp henceforth became known as Philipp I of Falkenstein, his family bore the name Bolanden-Falkenstein. In 1255 they became titular counts from the land inherited by marriage from the Counts of Hagen-Münzenberg and in this manner came to be established in the Frankfurt/Rhine-Main region. At Königstein im Taunus they built their new castle Neufal