the legal staff (Gerichtsboten); here there were 2 detention cells with barred windows. This building later served as a private house with an outbuilding to the south; it had been demolished by 1981. A row of two half-timbered houses dating from 1830 stood centrally on the foundation of the west wing of the early 14th-century castle. To the south was a stone building, the southern cellar entrance of which still exists and is called the Corvinus Cellar (Corvinuskeller). The area lying to the east of the demolished castle was used as a garden. The buildings were occupied by three families in 1981, but became so dilapidated that they had to be completely removed in the following years. The gardens were planted with forest trees. A hydrant by the track indicates where the old buildings used to be. Although the buildings were removed, the cellars remained, several entrances were filled in, others are still open. By 1990 the ruins were restored by Rasch, a stonemasons' company from Schulenburg, using stones found on the site. One of their finds was a decorative stone that resembled a coat of arms, which was set over the lintel of the entrance to the Corvinus Cellar. In the Corvinus Cellar is the inscription "Have patience, brother". In the 19th century King George V of Hanover built Marienburg Castle on nearby Schulenberg Hill (Schulenburger Berg) for his wife Marie of Saxe-Altenburg. Today Marienburg is owned by Prince Ernst August of Hanover, housing his administration, a museum and a restaurant. After the annexation of the Kingdom of Hanover by Prussia in 1866, Marienburg remained a private property while Calenberg Castle and its royal demesne became state owned. After 1920 however, following a compensation agreement, the demesne was returned to the House of Hanover, together with other property. The demesne buildings were sold in 2011, but the farmlands are still owned by the former royal family. Present-day ruins The remains of the fortress lie in the area of Old Calenberg (Alt Calenberg), which has been part of the Calenberg-Leine Valley Protected Landscape (Landschaftsschutzgebiet Calenberger Leinetal) since 1997. Of the fortress and the motte, only the ramparts, cellars and foundations of the fort, the manor house, the Corvinus Cellar and ruins of the battery tower remain. The battery tower and its 2 cellars have been locked since the middle of 2008. Bats hibernate in the vaulted cellars under the two