ブルームバーグの洞窟・トップ20

From 1892 to 1896, the castle was redesigned inside and out in the Belle Époque style by the Parisian architect Amand Louis Bauqué, who ran an architectural office in Vienna together with Albert Emilio Pio, and given a dome. On the central projection of the garden façade, above the balcony, are the coat of arms of the House of Fürstenberg and two ancient imperial busts depicting Marcus Aurelius and Lucius Verus, which were purchased in Rome in 1895.[10] Apart from a few modernization measures, this condition has been preserved to this day. Source: https://de.wikipedia.org/wiki/Schloss_Donaueschingen

The castle was built in French style

Great castle and park, but can only be seen through the hedges as it is not open to the public.

Unfortunately, you cannot access the park

You can find "Fürstenberg" all over Donaueschingen.

The Neuhewen is the highest volcanic cone in the Hegau (from the Celtic "hewen" = cone). Preserved: keep, remains of walls. Built in the middle of the 13th century for the Lords of Engen (Hewen). Mentioned in 1303-1308. Destroyed by Bavarian troops in 1639 during the Thirty Years' War. Repair work carried out in 1952 and 1962. Surrounded by a fence and not accessible. Source and floor plan of the castle ruins: https://www.alleburgen.de/bd.php?id=11676

Unfortunately I couldn't see much of it, it's not open to the public, unfortunately.

The Princely Fürstenberg Palace in Donaueschingen was built in the historicist style based on the French model. It is owned by the princely family and can only be visited on a guided tour at certain times. The palace can also be rented for events. The current palace was built on the site of older predecessor buildings around 1723. At that time, Prince Joseph Wilhelm Ernst zu Fürstenberg (1699–1762) moved the administration of the Stühlingen lordship, the Meßkirch lordship and the county of Heiligenberg to Donaueschingen. In 1821 (December 8th), the palace partially burned down. The burned-down second floor was rebuilt in the classicist style as a ballroom by Friedrich Weinbrenner by 1828. This part of the palace is considered the last work of the Baden architect. Between 1892 and 1898, the castle received its current appearance in the Belle Époque style by the Parisian architect Amand Louis Bauqué.