Of the old castle on a sitemeasuring 40 x 60 metres, only a small part of the bergfried has survived. The greater part of the castle was used as a quarry and much of the stone was carried away. The remaining tower ruins were extensively repaired. Originally the round bergfried was 33 metres high and had an outside diameter of 15 metres. Its walls were up to 3.5 metres thick and it had 5 stories.