Eldena Abbey (German: Kloster Eldena), originally Hilda Abbey (German: Kloster Hilda) is a former Cistercian monastery near the present town of Greifswald in Mecklenburg-Vorpommern, Germany. Only ruins survive, which are well known as a frequent subject of Caspar David Friedrich's paintings, including the famous Abtei im Eichwald ("Abbey in the Oak Forest").