The authorities’ policies towards the city changed significantly following Poznań’s integration into the Prussian defence system. The newly-built stronghold and a Citadel towering over the city had a profound impact on the further growth of the capital of the Wielkopolska region. A fortified ring encircled the city to protect Prussia in case of war with Russia or an armed attack by the local Polish population. A shift in urban functionality could easily be seen in Wilhelm Square, which the authorities assigned to many new uses, including that of a military drilling yard. However, in time, the site became predominantly a new hub of Poznań’s business, culture and social life.