The burgstall of the Altes Schloss ("Old Castle", German: Burgstall Altes Schloss) is the site of a, now levelled, mediaeval castle on the hillside of the Zaunsbacher Berg above the valley of the Trubach.

It lies around 1,000 metres south-shouteast of the village of Oberzaunsbach in the Upper Franconian municipality of Pretzfeld in the south German state of Bavaria.

[2] The simple site of the spur castle lies at around 450 m above sea level (NN) on a rocky crag on the hill of Zaunsbacher Berg that juts northwards into the Trubach valley.

It thus lies about 130 metres above the valley floor and is densely wooded today (Image 2).

[3] The castle rock is separated from the uphill slopes of the hillside on the southwestern side of the site by a gently arched gully in the terrain, about 6.5 metres deep and up to 20 metres wide (Image 6).