Tvrđa's military importance decreased after the Berlin Congress of 1878, with the increasing stability of the surrounding region. Most of the fort walls and fortifications were destroyed in the 1920s due to the obstacle they presented to the development of Osijek. While the fortifications have largely been removed, the fort's interior core remains intact and is now home to churches, museums, schools and other public buildings, as well as numerous bars and restaurants. Of the fortification system, only the northern side of the walls now remain intact, as well as parts of the first and eighth bastions along with the northern gate known as the 'water gate' ('vodena vrata'). Tvrđa sustained significant damage during the Croatian War of Independence during the 1990s and was featured on the 1996 World Monuments Watch List of Most Endangered Sites. It now features on Croatia's 'tentative list' for consideration as a nominee for a World Heritage Site.