Feste Kaiser Alexander

Feste Kaiser Alexander is a Prussian military fortress in Koblenz built with thick stone walls, angled bastions, and a central strongpoint designed for defense. The entire structure stretches across large grounds with carefully planned fortification lines and features the distinctive Lion Gate as its main entrance.

The fortress was built between 1816 and 1824 as part of Prussia's defensive strategy along the Rhine, and was named after Russian Tsar Alexander I. Shortly after its completion, it was connected to a neighboring sister fortress through an underground tunnel system.

The fortress shows how Prussian builders mixed strength with design when they created military structures in the 1800s. The Lion Gate stands out with its cast iron griffins and classical stone work, marking the entrance where soldiers and officials once passed through daily.

The fortress grounds are open to visitors, and you can climb the spiral staircase in the Lion Gate to reach a roof viewing platform. It helps to wear comfortable shoes since the terrain is uneven and the staircase is steep.

Beneath the fortress runs an underground tunnel network connecting it to a neighboring fortress, allowing strategic operations without exposure above ground. This hidden defensive system reveals the military planning that went into designing the complex.