The pink-plastered Jetty Barracks, built during the Russian era, is the main gateway to the fortress. The vaulted, tin-roofed stone barracks was built in 1868–1870. It was designed to accommodate 250 soldiers in peacetime. One part of the building was used as the main guard house with detention rooms, rooms for prisoners as well as rooms for the guards and the officer on duty. In addition, the barracks included a kitchen, the men’s living quarters and lavatories. The building has a beautiful clock tower. The valuable clock was made in 1868 in Germany. It was presumably donated to the garrison by a Russian tradesman. Nowadays, the building houses the tourist information centre, restaurant Suomenlinnan Panimo and an art gallery.