Strmol Castle (mansion) is a castle located at the foot of Dvorjanski hrib near the settlements of Češnjevek, Grad and Dvorje, in the municipality of Cerklje na Gorenjskem. The mansion was named after its builders, the Strmol family and it is notable as one of the few castles in Slovenia to retain a Slovene name throughout its history. It is currently a guesthouse and conference site for the government of the Republic of Slovenia.
Of the twelve medieval manors in the area of the modern municipality of Cerklje, Strmol Castle is the only one that has survived intact to the present. The castle is first mentioned in the 13th century, though there are no reliable records of its founding. The structure is centered on a towering keep with a late medieval core, taking its present form after renaissance and baroque renovations. The central keep is surrounded by a low, rectangular renaissance defensive wall, fortified with square corner turrets, which once featured a drawbridge over a moat. The interiors are richly furnished with historic furniture and art.
The castle is surrounded by a park, established in the late 17th century. It originally encompassed an orchard on the slope below the castle, and four fishponds on the plain below that, with a walking path with benches leading from the castle. The layout has not significantly changed, though only one of the ponds remains. The current arrangement includes an access path, which ascends the slope toward a square walled courtyard behind the castle. The wall is decorated with baroque female figures and puttos by Angelo PuttaPozzi, originally from the garden of the defunct Zalog (Wartenberg) manor by Moravče, but relocated here in the 1960s along with his Atlas statues at the northerm entrance steps. On the opposite side of the courtyard, the path descends toward a nearby road. Between the access paths there is an informal park, with an artificial lake and non-native trees.