The oldest parts of Neidenstein castle date back to the 13th century. It was first mentioned in 1319 as a fiefdom of Friedrich von Venningen. 1385 the castle was still an imperial fief of the lords of Venningen whose line Venningen-Neidenstein resided at the castle. Siegfried von Venningen († 1393) and Jobst of Venningen († 1410) were Grand Masters of the Teutonic Order, Hans von Venningen († 1478) was Bishop of Basel and Siegfried III of Venningen († 1459) was bishop of Speyer. The Venningen Neidenstein family line died out in 1611.
The castle was expanded with the outer bailey in the 16th century. The murals in the castle dates from 1516. The outer gate tower dates from 1569. In the end of the 18th century the castle started to decline. In the 1890s the roof of the western part collapsed which has since it been only a ruin. In 1897-1903 much of the castle complex was restored but also the top floor of the fortified tower was removed. Starting in 1960, the restoration of the castle was continued.
Neidenstein castle is today privately owned by the family of Venningen and can be visited only occasionally.
References:Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.