Once the summer residence of the Bishops of Paderborn, Dringenberg Castle has been carefully restored as part of an extensive development project, ensuring both its historical preservation and modern usability. Key challenges included uncovering sunken ruin structures, creating barrier-free connections between historic elements, and integrating archaeological findings. The project seamlessly blends natural stones from different eras with exposed historical structures, such as the remnants of the ruined chambers. A particularly striking feature is the rediscovered medieval horse gate, which has been incorporated into the new design, making the castle’s history more tangible. The project follows an integrative approach, combining the historical significance of the castle hill with contemporary needs. A development plan with six designated zones encompasses the entire castle grounds—from the maintenance of the surrounding woodland to the enhancement of the Zehntscheune and the castle courtyard. Special care was taken to ensure that history remains accessible, with the ruins integrated as living reminders of the past. The redesign strengthens the local community’s connection to its heritage. The newly created ruin garden and open spaces around the Zehntscheune provide a venue for cultural events, fostering social life on the castle grounds. Supported by EU EFRE funding and developed in close collaboration with local residents, the project successfully balances the preservation of history with a vision for the future.