The Castle can be visited
Museum
Elisabethenburg Castle

Elisabethenburg Palace in Meiningen, Thuringia, once served as the residence of the Dukes of Saxe-Meiningen. Its architecture, when viewed from above, resembles the letter “E”.
History+
Duke Bernhard I of Saxe-Meiningen had Elisabethenburg Palace built between 1682 and 1692. It was erected on the site of the former Würzburg Castle Meiningen. The E-shape of the floor plan is often interpreted as a tribute to his wife Elisabeth Eleonore of Brunswick-Wolfenbüttel, although architecturally it results from the combination of a central tower with a three-wing complex. Original plans for a symmetrical layout with additional tower roofs were not fully implemented. Stones from the ruins of Landeswehre Castle, among others, were used for its construction.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Schloss01.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.5706, 10.4123