Kasteel van Olsene, Castle in Zulte, Belgium

Kasteel van Olsene is a neo-Renaissance castle built in 1854–1859 to a design by Ghent architect Louis Minard, standing at the water's edge in Zulte. The red-brick building has a grey pitched roof, four corner towers with dark conical roofs, and a symmetrical front with tall stone-framed windows, a stepped central gable and a small clock face. A low arched stone bridge connects to its left side.

The structure was built in 1854 on the foundations of a medieval settlement called Hof ter Wallen that dated to the 11th century. Over the following decades, successive noble families shaped its character and made it their residence.

The swan in Olsene's coat of arms and the swans kept in the castle moat recall Pieter Lanchals II, who took the title lord of Olsene through his wife Jacoba Quévin in 1502, echoing the swans of Bruges. The Piers de Raveschoot family, owners from 1732 to 2002, never held that title, which had passed to the de Kerckhove family.

The property is not open to visitors, but the exterior can be seen from the N43 road connecting Ghent and Kortrijk that runs past the estate. This main road offers the best viewing opportunity for those passing through the area.

The castle is only open to the public on rare occasions, but the whole domain can be seen from the N43 between Ghent and Kortrijk. Since 1995 the castle has been protected as a monument together with the moat, the ice house and the two Spanish-style pavilions.