After the death of the last count of Homburg in 1449, the castle and town fell to the counts of Nassau-Saarbrücken. They expanded the castle into a fortified palace with bastions. Under the french King Louis XIV, the well-known master builder Sebastien le Prestre de Vauban expanded and fortified the citadel, whose mighty ruins still crown the mountaion and tower over the city. The fortress was destroyed in 1714. From the fortress you have a great view of the surrounding landscape. The ruins on the Schlossberg have been uncovered and secured since 1981. Most ot them date from the fortress period. Admission is free.