Slivnica Castle, Monument mansion in Čreta, Slovenia

Slivnica Castle is a four-winged mansion around a rectangular courtyard, with four corner towers and neo-Gothic windows. The northeast tower is nearly twice the height of the building and has a console balcony and a viewing terrace on top. A neo-Gothic chapel, linked by a balcony, stands on the south side.

A manor recorded in 1428, when Friderik of Klek granted it to his wife Marjeta, Slivnica was rebuilt in 1493 by Jurij Kolonič after war damage. In 1582 one of the Kolonič family turned it into a four-winged mansion with four round towers and a water moat. Count Klemens Brandis gave it its neo-Gothic form in 1862, adding a chapel consecrated by Bishop Anton Martin Slomšek.

The name Slivnica comes from the Slovene word for plum, and the estate appears in records as Schleinitz in German. The neo-Gothic chapel on the south side was consecrated in 1862 by Bishop Anton Martin Slomšek. A stone Baroque statue of Saint John of Nepomuk stands in the park surrounding the building.

The castle stands in the lowland part of Čreta, in the Municipality of Hoče-Slivnica, at coordinates 46.47628, 15.64980. The building is owned by the Ministry of Education and Sport and is not described in the sources as open to visitors, so view it from the surrounding park, where a stone Baroque statue of Saint John of Nepomuk stands in the middle.

Archaeologists in 1910 found the remains of a five-metre-deep defensive ditch that protected the castle mound, along with fragments of walls, animal bones and pottery. In the basement of the east wing a late-Gothic portal with a chamfered rib survives, and the ground floor and cellar of a tower hold a Renaissance star vault. A heraldic slab of 1582 with the coats of arms of the Kolonič and Wagn-Wagensberg families is set into the terrace of the south-east tower.