The Agency for Restoration of Osijek Tvrđa () was established in 1999. Its stated goals are protection, restoration and revitalization of Tvrđa. The restoration process aims to preserve architectural, historical and aesthetic qualities of Tvrđa in full accordance with the restoration principles set by the International Council on Monuments and Sites, while maintaining its multifunctional character. International cooperation is also envisioned, in particular with the Council of Europe. The Agency is jointly funded by the Government of Croatia, Osijek-Baranja County and the City of Osijek.