Posert Castle: A Medieval Fortress in Croatia
Site at a Glance
- Rating
- 4.8
- Popularity
- Low
- Country
- Croatia
- Primary era
- Medieval
- External website
- Open
- Eras represented
- Medieval
- Civilizations
- Habsburg
- Site type
- Military
- Remains
- Castle
On this page7 sections
History
Posert Castle is a ruined medieval fortress near Belaj in Istria, Croatia, whose surviving structure dates to the second half of the fourteenth century. The site is associated with the names St. Martin, Posrt, and Šabec, as well as Possert in Italian and Schabez in German. The relationship between these names remains uncertain because they were mentioned and constructed separately on several occasions, and archaeological research has not established whether they refer to one location or several.
Early references and medieval rule
The site is associated with Castrum Sancti Martini, a fortress mentioned in an eleventh-century grant by Ulric II, margrave of the Istrian March. A margrave was a frontier ruler or governor. Ulric II granted it to the Patriarchate of Aquileia, a powerful medieval ecclesiastical principality whose patriarchs held both religious and territorial authority in northeastern Italy and nearby regions. The reference places St. Martin within the political landscape of the eleventh century and connects the site with King Henry IV, an eleventh-century German king and Holy Roman emperor.
By the second half of the fourteenth century, St. Martin belonged to the County of Pazin. Its feudal lords were the Gutenegg family, and in 1436 the estate became part of the holdings of the Mojsijević patrician family. The area was then called Posshart, while the surrounding territory was known as Possert. The surviving castle has been dated archaeologically to this same broad period. Its construction may therefore belong either to the Counts of Gorizia, who ruled the area until their estates passed to the Habsburgs in 1374, or to the Habsburgs themselves.
Šabec, destruction, and later preservation
Juraj Barbo inherited the Mojsijević estate and Kožljak in 1529. Tradition or allegation credits this sixteenth-century nobleman with building a new fortress called Šabec. The distinct historical references to St. Martin, Posert, and Šabec have contributed to the continuing uncertainty over the identity and location of the fortifications.
Between 1614 and 1617, St. Martin or Possert and the Šabec area were occupied and destroyed during the Uskok War of 1615–17, a conflict between Venice and the Uskoks, frontier communities associated with Habsburg military interests. The old Šabec fortress was subsequently ruined and abandoned, and Barbo built Belaj Castle south of it. The ruins were restored between 2009 and 2014 and are protected as maintained castle ruins.
Remains
Layout and defensive remains
Posert Castle is built of limestone on an irregular trapezoidal plan, a four-sided layout whose sides are not all equal or parallel. Its wider side faces north. The northern part contained the central area, while the central and southern parts formed an external fortified courtyard, an enclosed open space protected by defensive walls or structures.
Corner defensive tower
The best-preserved element is a rectangular corner defensive tower. It originally had five floors and survives to a height of 17 metres. Its irregular plan measures approximately 8 by 6 metres, making the tower the clearest surviving expression of the castle’s defensive construction.
Church of St. Martin
A small Church of St. Martin stands immediately beside the castle ruins. The church dates from 1367 and provides a closely dated religious feature associated with the wider historical setting of the fortress.
