Burganlage, Medieval castle in Bad Neustadt an der Saale, Germany.

Burganlage is a medieval fortress perched above Bad Neustadt an der Saale with stone walls and traces of various construction periods. The site displays typical features of a fortified complex with different structures built over many centuries.

A deed copied around 1160 first names the Salzburg, though the original may have been altered by the Fulda monk Eberhard. From about 1170 the castle was expanded into one of Central Europe's largest Ganerbenburgen, with seats for a vogt and a schultheiss and five more from 1220, largely finished by 1250. In 1434 the joint owners signed a Burgfrieden after disputes.

The name Salzburg refers to the salt district (Salzgau) and the castle hill, not to the Austrian city. From around 1170 the site grew into one of the largest Ganerbenburgen in Central Europe, a castle held jointly by ministerials such as the Voit von Salzburg, Brende and Heustreu families, each with its own residence. A Burgfrieden of 14 July 1434 settled disputes among these co-owners.

The ruins are accessible from outside at any time and offer views across the surrounding landscape. The path uphill is partly steep and requires sturdy footwear, especially after rain.

In 1984 an official excavation found that the first stone ring replaced a palisade trench cut into the limestone; a wooden rampart stood about a metre behind the wall, likely a provisional protection for the building site. Long stretches of the oldest curtain wall were never built beyond the foundation, and its finished parts reach at most four metres.