Kastellet Archaeological Site

Address: Kastellet (The Citadel), 2100 Copenhagen Ø, Denmark

Website: https://www.kastellet.dk

Hours: Grounds open daily (public park)

Admission: Free (grounds)

Kastellet is a star-shaped fortress and public park on the harbor front of Copenhagen, Denmark, notable for its intact bastioned layout and defensive earthworks. The site dates in its present form to the 17th century and has been maintained as both a military site and public green space.

Visitors encounter moat-lined ramparts, gates, walking paths and historic buildings, including a windmill and former barracks. Kastellet remains a functioning military area in part, but most of the grounds are open to the public and used for walks, ceremonies and historical interpretation.

Kastellet lies on the northern edge of Copenhagen’s historic centre, a short walk from the waterfront and other central attractions, and offers views across the harbor and toward the city.

• 17th-century origin: Originally constructed and remodeled in stages from the 17th century, the fortress retains a classic star-shaped bastion layout and is one of Northern Europe’s best-preserved examples of this type.

What to See#

• The Citadel ramparts: A well-preserved star-shaped citadel with moats, ramparts and gates that now functions as a public park and historical site within Copenhagen’s waterfront area.
• Kastellet windmill and buildings: A Dutch-style windmill located on the ramparts and maintained as a historic structure; the area also includes military buildings and barracks from later periods.

Kastellet is the star‑shaped fortress in central Copenhagen. The site is about a 5-10 minute walk from Østerport Station (served by S‑trains and regional trains) and a 15-20 minute walk from Copenhagen Central Station. It’s also within easy walking distance of Nyhavn and Kongens Nytorv; several city buses and the Metro at nearby stations serve the area.

• Enter from the Langelinie/Little Mermaid side to combine both attractions and begin the rampart walk; early weekday mornings are especially peaceful for strolling the star-shaped fortifications.
• Bear in mind Kastellet is an active military area with some restricted buildings-stick to marked public paths, and check opening times if you want to see the interior structures or the windmill.