

The chapel was built in 1655 and modelled after the Santa Casa Chapel in Loreto near Ancona. In the presbytery, a statue of the Black Virgin and Child is preserved in a niche.
The castle cellar is part of the basement of the administrative court, which was built in 1478. It is decorated with frescoes painted in 1940 by Matej Sternen for the restaurant located there, at that time, called the Castle Cellar. Before that, the room was decorated with frescoes by Viktor Cotič. After the Second World War, this room was also used for museum purposes. Since 2006, it has been used for the exhibition Beginnings, and since 2010 for the exhibition First Touch.
The castle staircase was built between 1747 and 1749 on the site of an earlier entrance with a stair tower. It is famous for its stone balustrade decorated with statues of 16 boys. The statues symbolize various sciences, arts, economic activities, and more. They are accompanied by metaphors of the seasons and the goddesses Ceres and Diana.


After 1620, the Counts of Khisl broke through the main building with a porch, which gave new access to the eastern courtyard. At the same time, the previously unified cellar was separated and its northern part, today called the deep cellar, was newly vaulted.

In 1591, the cellar was built, and two floors above it - the first containing a kitchen and a storeroom, the second two rooms. Since 2010, the basement has been used for the exhibition Ars Pharmaceutica - the Art of Pharmacy.

The castle bastion was built between 1555 and 1562 by the plans of Domenico dell'Alio. In 1750, it was bought by the Counts of Brandis, the first floor was added, and incorporated into the castle. In 2004, the embankment was removed from its northeastern corner. Since 2007, the ground floor has been used for the exhibition Between the Glamour and Misery of the Middle Ages. Since 2014, the first floor has been used as a viewing depot for the painting collection, and since 2015 as a viewing depot for the sculpture collection.


The Castle Lodge was built on top of the city walls between 1668 and 1682. Count Hans Jakob Khisl covered the lodge with a ceiling supported by arcades. Around 1733, the lodge and the Knights' Hall were connected by an arcaded bridge.

In 1680, the Khisli Counts built the Knights' Hall. The ceiling was then decorated with plaster stucco by Alessandro Sereni and the wreath of images around the central field was painted by Laurenzo Laurigo. In 1763, Joseph Michael Göbler also painted the central field of the ceiling.

The castle staircase was built between 1747 and 1749 on the site of an earlier entrance with a stair tower. It is famous for its stone balustrade decorated with statues of 16 boys. The statues symbolize various sciences, arts, economic activities, and more. They are accompanied by metaphors of the seasons and the goddesses Ceres and Diana.

At the north end of the main wing, on the first floor, there is a room with partially preserved frescoes from the first third of the 18th century. Groups of Chinese people are depicted in various games.

The castle bastion was built between 1555 and 1562 by the plans of Domenico dell'Alio. In 1750, it was bought by the Counts of Brandis, the first floor was added, and incorporated into the castle. In 2004, the embankment was removed from its northeastern corner. Since 2007, the ground floor has been used for the exhibition Between the Glamour and Misery of the Middle Ages. Since 2014, the first floor has been used as a viewing depot for the painting collection, and since 2015 as a viewing depot for the sculpture collection.

1478
In 1478, on the order of Emperor Frederick III, an administrative court was built at the north-eastern corner of the city walls. It was intended to provide the city with a stronger fortification and better services during the turbulent times of the Hungarian and Ottoman threats. The basement and ground floor of the manor were vaulted, while the top floor had a flat ceiling. The original height of the building is indicated by a painted wreath of intersecting arches, still visible in the attic.
The bastion, one of four defensive buildings in Maribor designed by Domenico dell'Allia, was built at the north-east corner of the walls. The defensive strength of the bastion was increased by the embankment in its north-eastern part, which was removed in 2007. Five of the six former firing lines are preserved on the ground floor, with iron rings underneath to help hold the cannons in place. Judging by the depictions, the upper platform was also used to mount cannons. In 1750, the bastion was bought by Count Brandis and converted into a residential storey.
The Barons of Khisl (Counts from 1623 onwards, owners of the castle until 1686) began to convert the castle into a residence when they became hereditary owners in 1620. They broke through the main building with a levelled porch, added four corner towers, of which only the south-eastern one survives, and after 1640 added arced corridors on the south and west sides. A tower with a stairway was also added on the west side.
1655
Jurij Jernej Khisl built the Loreto Chapel, which was consecrated by Bishop Vaccano in 1661. A statue of the Black Virgin and Child is preserved in a niche in the wall, and on the walls are tall wooden candlesticks with the 17th-century coat of arms of the Counts of Khisl and Berka. The oratory, built after 1727, was intended for the castle family. The surviving votive images prove that the chapel was visited by the townspeople.
HISTORY OF THE CASTLE
An arched corridor was built on top of the city walls, as part of the castle. Count Hans Jakob Khisl had a ceiling built over the eastern wing, which was supported by arches. The eastern wing consisted of the stables in the south (before 1590), the milk storage and warehouse in the north and the meat storage above (1590-1591).
The ceiling of the Knights' Hall was decorated with plasterwork by Alessandro Sereni and his assistants around 1680, and the painter Laurenzo Lauriga painted allegories of the four seasons, the Roman gods Jupiter and Mars, scenes of Odysseus's return to Ithaca, and two war scenes of battles with the Turks. In 1763, the Graz painter Joseph Michael Gebler painted the central ceiling scene of the battle with the Turks. The hall has hosted famous personalities, among them Pope Pius VI (1781) and Franz Liszt (1846).
On the site of the old stair turret, the Counts Brandis (owners of the castle 1727-1876) built a new building as a ceremonial access to the Knights' Hall. The exterior is vibrantly varied and decorated with stuccoed Rococo ornamentation, and is also adorned with the alliance coats of arms of the Brandis and Trauttmannsdorf families. The interior has a stone balustrade decorated with statues (boys symbolising the various sciences, economic activities and the arts, the goddesses Ceres and Diana, niches with allegories of the seasons) and iron lamps in the shape of a tulip and a sunflower have been preserved.
In 1933, the Municipality of Maribor bought the castle from Vilko and Berta Berdajs (the owners of the castle 1921-1933), and in 1938 the Maribor Regional Museum moved in. The castle was converted for museum use and a ground-floor corridor was added to the inner courtyard of the castle.