Donaustauf Castle: A Medieval Episcopal Hill Fortress in Germany
Site at a Glance
- Rating
- 4.7
- Popularity
- Medium
- Country
- Germany
- Primary era
- Medieval
- Eras represented
- Iron Age, Medieval, Early Modern
- Civilizations
- Celtic, Duchy of Bavaria, Holy Roman Empire
- Site type
- Military
- Remains
- Castle
On this page12 sections
History
Donaustauf Castle is a ruined medieval hill castle in Germany, built under the Bishop of Regensburg between 914 and 930 to defend against Hungarian invasions. Rising on a hill spur above the Danube in Donaustauf, the castle became the protective center of a medieval settlement and later formed part of the territorial power of the Bishopric of Regensburg.
Early fortification and episcopal rule
The hill had already been fortified around 500 BC by a Celtic community. Excavations on the northeast side of the lower outer bailey in 1981 connected this early occupation with the late Hallstatt period, an Early Iron Age cultural period in central Europe. The extent and importance of the Celtic fortification remain uncertain, but archaeological remains in the castle area place the site within a long history of fortified settlement.
Between 914 and 930, Bishop Tuto of Regensburg ordered a castle to be built on the hill to strengthen the region against Hungarian attacks. A record dating between 894 and 930 calls the place castellum quod dicitur Stufo. The name came from the Old High German word stouf, meaning a cone-shaped rock or hill. By the eleventh century, the castle held major strategic importance for the Bishopric of Regensburg, an ecclesiastical principality whose bishop exercised both religious and territorial authority. A document of 1132 names it castrum Episcopi Tuonustouphen, identifying it as the bishop’s castle.
Bavarian dukes trying to extend their authority over Regensburg captured and partly destroyed Donaustauf Castle in 1132, 1146, and 1161. Emperor Frederick Barbarossa, the twelfth-century German king and Holy Roman Emperor, reportedly spent the night of 7–8 September 1156 at the castle before continuing to the Imperial Diet at Barbing on 8 September. The bishops also used Donaustauf as an occasional residence. Bishop Albert I stayed there during his tenure from 1217 to 1259, while the castle was administered by ministeriales, service nobles who performed military and administrative duties for their lord.
Financial pressures repeatedly led the bishopric to pawn the castle during the thirteenth century. Its religious and political associations nevertheless continued. Albertus Magnus, the Dominican theologian, philosopher, and Bishop of Regensburg, wrote a commentary on the Gospel of Luke at Donaustauf. In summer 1324, Bishop Nicholas of Regensburg took refuge there from a legate of the Archbishop of Salzburg. After 1331, he frequently stayed at Donaustauf and Wörth.
Changes of lordship and military damage
Donaustauf Castle belonged to the Bohemian Crown from 1355 to 1373. In July 1355, Emperor Charles IV, King of Bohemia and Holy Roman Emperor, came to Donaustauf in person to take possession of it. In 1373, the castle passed to the Wittelsbachs, the major ruling dynasty of Bavaria. The Wittelsbachs returned it in 1385 to the Imperial City of Regensburg, which had briefly held it as a pledge in 1301.
The castle was devastated during the War of the Cities, a conflict between cities and territorial rulers, from 1385 to 1388. Bavarian troops unsuccessfully besieged it in 1388. Under Regensburg’s control, the castle also served as a prison for citizens of Donaustauf. Duke Albert IV of Bavaria personally repossessed it in 1488, bringing the stronghold back under Bavarian rule.
From the fourteenth through the seventeenth century, the fortifications were enlarged for defense. In 1610, Duke Maximilian I of Bavaria refortified the castle and added bastions, projecting structures designed to support defensive fire and reduce vulnerable angles in the walls.
Destruction and later ownership
During the Thirty Years’ War, the prolonged European conflict of 1618–1648, Swedish forces captured the fortress in January 1634. The Bavarian garrison had attacked Swedish supply troops, provoking the assault. The castle was taken with heavy Swedish losses and then blown up and burned. It was provisionally repaired and inhabited again after the Swedish withdrawal, but it fell into decay from the late seventeenth century and was subsequently used as a quarry.
In 1810, the ruins passed to Bavaria with the former Bishopric of Regensburg. On 18 March 1812, the Bavarian state transferred them to the House of Thurn and Taxis as compensation for postal rights in Bavaria. The eastern side of the castle area was then laid out as an English-style park with an avenue. Since 1899, the Princes of Thurn and Taxis have held the hereditary title of Duke of Donaustauf and Wörth.
The municipality of Donaustauf acquired the ruins on 6 April 1986. From 1997 onward, it secured and renovated the surviving remains. Donaustauf Castle is protected as an architectural monument and is also recorded as an archaeological monument representing a fortified hill settlement of the late Hallstatt and early La Tène periods, the latter being a later Iron Age period associated particularly with Celtic communities.
Remains
Donaustauf Castle occupies a hill spur at approximately 424 metres above sea level above the Danube. It was arranged as a section castle, a defensive complex divided into successive fortified areas by walls, gates, and ditches. The surviving medieval fabric includes a rubble-masonry ring wall, the residential palas, inner gate buildings, and a chapel. These oldest surviving medieval elements date from approximately 1060–1070 and were modified during the late Middle Ages. The castle originally had six successive gates, while four remain visible today.
Outer defenses and gates
Successive entrances
The first gate stood on the northeast side of the complex. The second was flanked by rubble-stone walls and led toward the inner castle. The third consisted of a gate tower with a round-arched entrance and a shield wall above a ditch, built in ashlar masonry, which uses carefully shaped stone blocks. The fourth gate stood beside the stump of a round tower. The fifth retains visible ashlar masonry and a round-arched passage. The sixth was a two-storey, vaulted gate building, with the castle chapel occupying its upper floor. A neck ditch additionally separated the inner castle from the second gate.
Eastern round tower
Beneath the palas is the stump of an eastern round tower built from bossed ashlar, stone blocks with raised, roughly finished faces. The tower measures 15 metres in diameter and has walls 5 metres thick. It was added to protect the side facing the otherwise unprotected outer-bailey plateau. In a later phase, it was probably used as a gun position.
Inner castle buildings
Castle chapel
The early Romanesque chapel occupies the upper storey of the inner gate tower. Romanesque architecture uses heavy masonry, round arches, and compact forms. The chapel has a square plan, a three-aisled hall, and three bays. Its surviving north and west walls contain semicircular wall niches and attached columns with cube capitals. The existing columns are replicas. Later alterations inserted Gothic lancet windows, narrow pointed openings, into the Romanesque vaulting.
The chapel resembles the Magdalene Chapel of St. Emmeram in Regensburg. Its partial incorporation into a gate tower gives it an unusual architectural arrangement within a castle, combining a religious space with a major defensive entrance.
Residential hall and defensive tower
Only one wall of the palas, the principal residential and representative building of a medieval castle, survives. It contains a Romanesque double window with a column. The square bergfried, a usually separate defensive tower used as a strong refuge and observation point, has not survived.
Outer bailey and later landscape
The northern outer bailey is surrounded by a ditch and now contains a small cemetery. On the eastern side, the castle area was transformed in 1812 into an English-style park with an avenue. These later landscape features occupy parts of the fortified complex while the surviving walls, gates, chapel, and tower remains preserve its medieval defensive arrangement.
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