Hillenraad Castle (Dutch: Kasteel Hillenraad [kɑˈsteːl ˈɦɪlə(n)ˌraːt]; Limburgish: Kesjteel Hilleraod [kəˈʃteːl ˈɦɪləʀɔːt]) is a 14th century square water castle located on the south side of Swalmen in the municipality of Roermond in the province of Limburg.

The entire complex consists of twenty separate entries in the national monument register, including the main building, the outbuildings and a number of elements in the park.

Seller Robijn, canon of St. Servatius in Maastricht, inherited these goods from his brother Werner van Swalmen.

Dirk promised, among other things, that he would make his castle, which he kept on loan from the Duke of Gelre, available if the city so requested.

With this purchase, the Schenck family, also owners of the Swalmen and Asselt estates, rose strongly in prestige.

In 1703, eight-year-old Christoffel Arnold Adriaan Schenck van Nijdeggen was fatally wounded while playing with a loaded rifle.

His father, Arnold Schenck, then bequeathed all his possessions to his wife Maria Catharina Margravine van Hoensbroeck.

Hillenraad was rebuilt again under their son Lotharius Frans van Hoensbroeck: in 1766 a roofer died after falling from the roof.

Under the Roermond bishop Philip Damiaan Lodewijk van Hoensbroeck, Hillenraad Castle was a center of musical life in the Maasland in the fourth quarter of the 18th century.

In November 1918, the castle was briefly in world news when the German Crown Prince Wilhelm and his military retinue were interned there.

The corner pavilions feature constricted spiers topped by octagonal closed lanterns with bell-shaped endings.

The façade is crowned in the middle by a stone pediment with the alliance coat of arms of the 17th century couple Schenck of Nydeggen Van Oyenbrugge in relief and painted figures of Zeus and Poseidon.

Very special is the banquet hall on the main floor, which has been largely preserved in its original state, and its furnishings are an example of Liège Baroque and Liège-Aachen furniture style from that period.

The room can be seen as an 18th-century Gesamtkunstwerk with, among other things, a beautiful plastered ceiling, a parquet floor inlaid with figures, an oak hall paneling with richly decorated paneling.and door and window frames, a carved stone chimney and some antique tapestries .

The outer bailey is built around a spacious forecourt and consists of three perpendicular wings with hipped roofs (17th century, partly rebuilt around 1920).

On the other side of Hillenraederlaan is an old barn with a curly facade, the front part of which was later converted into a residential house.