Location: Pusarnitz, Carinthia Map
Constructed: 12th century
Burgruine Feldsberg, also known as Feldsberg Castle Ruin, is a
medieval castle ruin located in the Austrian state of Carinthia. It
sits atop a wooded hilltop west of the village of Pusarnitz, within
the municipality of Lurnfeld, near the town of Spittal an der Drau.
The site's coordinates are approximately 46°50′28″N 13°23′42″E. The
castle is classified as a Höhenburg (hilltop castle), positioned on
a plateau that provides a defensive vantage point over the
surrounding landscape, including the nearby Drava River valley. This
location was strategically chosen for its elevated position,
offering control over local routes and territories in the Mölltal
region. Access to the ruins today involves hiking through forested
paths, though specific trails are not well-documented in popular
sources, suggesting it may be a lesser-visited site compared to more
prominent Carinthian castles.
The surrounding area is part of
Carinthia's alpine terrain, characterized by dense forests, rivers,
and nearby mountains. Pusarnitz itself is a small settlement, and
the castle's proximity to other historical sites like the Treaty of
Pusarnitz memorial underscores its regional importance. The ruin
blends into the natural environment, with overgrown vegetation
contributing to its secluded atmosphere.
Origins and Early History
Feldsberg succeeded an earlier
fortification, Burgruine Hohenburg, located higher on the same ridge
roughly 1.6 km away. After Hohenburg was abandoned, the Archbishopric of
Salzburg built the new castle in the mid-12th century as a Romanesque
stronghold. It was associated with the Lords of Feldsberg and staffed by
Salzburg ministeriales (unfree administrative and military knights
serving the archbishop).
The first documented reference occurs in
1189 with the name of Hainricus (or Heinricus) de Veldisberc, a Salzburg
ministerialis. From this base the castle administered the local
Burgfried (castle jurisdiction) belonging to Salzburg and exercised
lower judicial authority over the surrounding area. Its position made it
useful for territorial control in a region of competing secular and
ecclesiastical interests.
Conflicts with the Counts of Gorizia
Throughout the later Middle Ages, Feldsberg repeatedly became a point of
contention between the Counts of Gorizia (Görz) and the Archbishopric of
Salzburg. The counts sought to expand their influence into Carinthian
territories held or claimed by the ecclesiastical prince-archbishopric;
the castle served as a tangible symbol and practical strongpoint in
these disputes.
The Peace of Pusarnitz (1460)
The castle’s
most significant historical moment came in January 1460. On 25 January
1460, key negotiations (and, according to several accounts, the
conclusion or pre-negotiation) of the Peace (or Treaty) of Pusarnitz
took place at Feldsberg. The site was chosen in part because it was
Salzburg ecclesiastical territory and therefore relatively neutral
ground.
The treaty ended the succession war over the inheritance of
the extinct Counts of Cilli (Celje) between Emperor Frederick III (who
was also Duke of Carinthia and Styria) and Count John II of Gorizia.
Frederick III had a 1443 inheritance agreement with the Cilli; John II
relied on an earlier 1377 pact and sought to secure the County of
Ortenburg (which the Cilli had acquired in 1420). After three years of
fighting, a decisive engagement near Burg Sternberg ended in a Gorizia
defeat. At Feldsberg, Count John was compelled to accept hard terms: he
renounced claims to the counties of Ortenburg and Sternberg and ceded
all his possessions east of the Lienzer Klause to Frederick III. This
included former Heunburg lands in Lower Carinthia.
The agreement was
a major step in Habsburg consolidation and Carinthian territorial
formation. A memorial plaque in Pusarnitz records the event and notes
that it occurred within the Burgfried of the Salzburg Pfleggericht
Veldsperg on neutral territory. Local sources sometimes state that the
peace was concluded on the castle itself.
Decline and Later
History
Feldsberg’s administrative importance waned in the late 16th
century when jurisdiction was transferred to the nearby castle of
Sachsenburg. Maintenance appears to have ceased; the last documented
caretaker (Pfleger) is recorded for 1586. By 1658 the building was
already described as a ruin. Unlike some other regional castles, it was
never substantially rebuilt or converted into a residence.
In 1848,
as state property, the site was parceled out and taken into peasant
ownership. It has remained largely unrestored. One secondary source
lists a private owner (Gabriele Pichler) in connection with the
Austria-Forum entry based on older castle lexicons.
Summary
Context
Burgruine Feldsberg is a modest but historically illustrative
example of a mid-12th-century Salzburg ministerial castle in Upper
Carinthia. Its Romanesque masonry (especially the opus spicatum walls),
cistern, and defensive layout preserve clear evidence of its original
form. Its role in the 1460 Peace of Pusarnitz links it directly to the
larger process by which the Habsburgs strengthened their hold on
Carinthia after the Cilli inheritance disputes. The site’s rapid decline
after the transfer of judicial functions to Sachsenburg reflects the
broader shift toward more centralized administration and the
obsolescence of many smaller hilltop fortifications in the early modern
period.
Burgruine Feldsberg exemplifies a simple Romanesque hilltop
fortification, adapted to the irregular terrain of its plateau site. The
ground plan is an uneven quadrangle, conforming to the natural contours
of the hilltop for enhanced defensibility. Key surviving elements
include remnants of walls on the north and west sides, reaching up to 8
meters in height. These walls feature distinctive herringbone masonry
(opus spicatum), a technique involving diagonally laid stones that was
common in Romanesque architecture for added strength and aesthetic
appeal.
The castle's tower, likely a central defensive feature, now
exists only as a low cone of rubble, indicating significant collapse
over time. Access to the interior was via the southeast side, which
would have been the most approachable and thus fortified entrance. A
notable utilitarian element is a buried cistern, visible as a circular
depression in the northwest corner (referred to as the north angle in
some sources). This cistern would have collected rainwater, essential
for sustaining occupants during sieges or isolation.
Overall, the
architecture reflects modest scale and functionality, typical of
ministerial castles built for local administration and defense rather
than grandeur. There are no indications of later Gothic or Renaissance
additions, suggesting the structure remained largely unchanged from its
12th-13th century origins until its abandonment.
Current State and Visiting
Today, Burgruine Feldsberg is in a state of advanced ruin and serious
dilapidation, with much of the structure reduced to low wall fragments
and rubble. The site is overgrown with forest vegetation, which has
contributed to further erosion and obscured some features. It is
protected as a historical monument under Austrian heritage laws
(classified with the code AT-2), but there are no reports of active
restoration efforts. The ruins are not a major tourist attraction,
lacking facilities like guided tours, signage, or easy access roads,
which makes it appealing primarily to history enthusiasts, hikers, and
locals.
Visiting involves a hike through wooded paths from Pusarnitz
or nearby areas, potentially steep and unmarked in places, so visitors
should prepare with appropriate footwear and navigation tools. The
site's seclusion offers a peaceful experience with views of the
Carinthian countryside, but safety precautions are advised due to
unstable ruins. Photographs of the site are scarce in public domains,
but available images depict scattered stone walls amid trees,
emphasizing the herringbone pattern and the rubble tower base. No
entrance fees apply, and it can be combined with visits to nearby sites
like Burgruine Hohenburg or the broader castle trails in the Spittal
district.
Significance
Burgruine Feldsberg holds cultural and historical value as a representative example of Romanesque ministerial fortifications in Carinthia, illustrating the role of such structures in medieval feudal administration and regional conflicts. Its involvement in the Treaty of Pusarnitz negotiations highlights its brief but notable place in Austrian diplomatic history. As part of Carinthia's extensive castle heritage—listed among hundreds in regional inventories—the ruin contributes to understanding the transition from medieval strongholds to abandonment in the early modern period. Though not as prominent as larger sites like Hochosterwitz, it offers insights into the everyday architecture and power dynamics of Salzburg's influence in the area, making it a point of interest for academic studies on Austrian medieval history.