What is "befreiungshalle"

The Befreiungshalle ("Hall of Liberation", ) is a Neoclassical monument on the hill Michelsberg above the town of Kelheim in Bavaria, Germany. It stands upstream of Regensburg on the river Danube at the confluence of the Danube and the Altmühl, i.e. the Rhine-Main-Danube Canal. It was commissioned by King Ludwig I of Bavaria to commemorate the victory over Napoleon in the Befreiungskriege of 1813-15.