The Château du Falkenstein is a ruined castle in the commune of Philippsbourg in the Moselle département of France, at the heart of the Parc naturel régional des Vosges du Nord. This semi-troglodyte castle dominates the Zinsel valley.
The castle, built by Count Pierre de Lutzelbourg, is mentioned for the first time in 1127. It was intended to protect the possessions of the Count in the Forêt Sainte (Holy Forest) of Haguenau.
In 1150, Renaud, son of Pierre, died without heir. The castle was therefore shared between Folmar of Sarrewerden and the Hohenstaufen family. Jacques de Falkenstein appears as a witness in a charter signed at Haguenau in 1205 and, in 1316, Gottfried, Conrad, Heinrich and Jacob de Falkenstein made peace with the city of Strasbourg. A paix castrale (castle peace) was signed in 1335, dividing the castle in three shares along the transverse walls.
In 1419, Jean de Finstingen made himself Lord of Falkenstein seeing that he was the occupier on behalf of the Sarrewerdens. In 1474 Wilhelm von Falkenstein died, whereupon his sons Godfrey, Ortlieb and William inherited the castle and made an agreement to divide the property among themselves, agreeing that no part could be ceded, even to another member of the family, without the consent of the other shareholders. The shareholder in residence in 1479 attempted to sell the castle to the counts of Zweibrücken-Bitche, and in 1482 a conflict blew up over non-respect of the agreement between the members of the family. When the dispute was finally settled in 1487, with the castle in the hands of Wilhelm von Falkenstein, he dedicated a new chapel in the castle.
The Falkensteins were sole masters of the castle in 1515 and the modernisation begun by Balthasar was continued by his son. In 1564, Philippe IV (1538-1590), Count of Hanau Lichtenberg, bought the castle from Balthasar's children and grandchildren and, some months later, it was completely destroyed by fire and never rebuilt.