It is possible that there was already a castle on that site in the second half of the 13th century, because at that time the settlement of Roop already existed as a Hakelwerk, that is, a small town surrounded by a palisade.

[4] The first written mention of a castle belonging to the Rosen family in what was then Roop dates back to 1310, when it was besieged by Lithuanians.

[3] A generation after Hennecke, the Rosen lands were divided into three independent properties, which were named after their noble seats: Groß-Roop, Klein-Roop and Hochrosen.

At that time, the Groß-Roop complex probably consisted only of a fortified quadrangular tomb and a castle courtyard to the north, which bordered the town of Roop.

At the same time, a Gothic church was built to the east, which was integrated into the defensive system of the complex by being connected to the tower and the new residential wing by a ring wall.

[1] Since the owners were on the side of the Poles in the Polish-Swedish War and thus the losers, King Gustav Adolf confiscated the restored Gross-Roop Castle in 1625[4] after his troops had gained the upper hand in the Riga area, and gave the complex as a fief to Lieutenant Colonel Wilhelm von Wallenstein.

[1] Shortly after the end of the war, Count Peter von Lacy acquired the damaged complex and had it rebuilt and remodeled by 1743[1].

In 1780[1] he sold Groß-Roop to Peter von Lacy's nephew, the Governor General of Livonia Georg Graf Browne, who in turn was succeeded by the Counts of Solms and Tecklenburg as lords of the castle.

In 1797, Heinrich Friedrich von Solms and Tecklenburg mortgaged the property to his secretary Jakob Bernhard Müller, who ceded it to the Russian Emperor Paul I in the same year.

The then owner, Baron Hans von Rosen, had it rebuilt and restored between 1906 and 1909 according to plans by the Riga-born architect Wilhelm Bockslaff.

The destroyed parts were reconstructed as far as possible, such as the stucco ceilings in the interior rooms or the large baroque staircase made of oak.

The fortified predecessor of Gross-Roop was located on an elevated spot above the river and was protected from attacks by a bend in the Brasla and dammed ponds on two sides.

The two unbuilding sides in the southwest and southeast of the courtyard are closed off by the remains of a defensive wall that dates back to the time of the castle.

The north-west wing is adjoined to the south corner by a two-storey rectangular building with a tiled hipped roof, which was formerly called the Knights' Hall.

The church with the high pointed arch windows was formerly three-aisled and had a vaulted interior, but was rebuilt in a modified form after being damaged by a fire.

The interior includes a painted pulpit from 1739 and stained glass windows in the apse, which were made according to designs by the artist Sigismunds Vidbergs and installed there in 1940/1941.

The place where the park is now extending in the 14th century since 1374 there was the city of Straupe in accordance with the Riga Law and also being a member of Hanseatic League.