Stävlö Castle, 19th-century château in Kalmar Municipality, Sweden.

Stävlö Castle is a château in Kalmar Municipality, Sweden, built around a four-story central block with side wings extending outward on both sides. These wings connect to single-story pavilions at each end, giving the whole building a symmetrical, balanced layout.

Stävlö belonged in the Middle Ages to the Tillbakaseende Ulf family and passed through the Lewenhaupt family around 1700. Carl Otto Posse became owner in 1834, demolished the original manor house and completed his new castle in 1860. The Posse family left Stävlö in the 1880s; the last owner from the family was Fredrik Posse, son of Carl Otto.

The double-height music room topped with a glass cupola shows how much music and social gatherings mattered to Swedish nobility in the 1800s. Rooms like this served as the social heart of the estate, where family and guests came together for concerts and evenings of entertainment.

The château is privately owned, so the interior is not open to visitors in general. The exterior and grounds can still be seen from a distance, making a brief stop worthwhile for those passing through the area.

The building's layout is shaped to mirror the Posse family coat of arms, a rare case where a heraldic symbol directly determines the form of a structure. This connection between the crest and the floor plan is not obvious at first glance and tends to go unnoticed by most visitors.