At the east-northeast end of Fő utca in Sopronhorpácsi is the main gate of the castle park. György Széchényi, Bishop and Archbishop of Győr, then Archbishop of Kalocsa In the 16th century, the estates of the Széchényi family, including Horpács.

Ferenc Széchényi planted a lime tree opposite the southern park entrance of the castle. This specimen, called the Széchényi Memorial Tree, has since become a tree giant.