Kastellet
Archaeological Site Star-shaped 17th-century fortress and Copenhagen green space
A well‑preserved 17th‑century star‑shaped citadel in Copenhagen, Kastellet offers brick ramparts, a central church and a windmill; visitors stroll the ramparts, attend occasional military ceremonies and enjoy nearby waterfronts.
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.
How to Get to Kastellet #
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.
Tips for Visiting Kastellet #
- 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.
Best Time to Visit Kastellet #
Visit from late spring to early autumn (May-August) for the mildest weather and longest daylight; summer is busiest.
Weather & Climate near Kastellet #
Kastellet's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in July) and cold winters (coldest in February). Temperatures range from -1°C to 21°C. Moderate rainfall (604 mm/year).
January
January is cold with highs of 3°C and lows of -1°C. Moderate rainfall (49 mm), mostly overcast skies, and breezy conditions.
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February
February is the coolest month with highs of 3°C and lows of -1°C. Moderate rainfall (31 mm) and mostly overcast skies.
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March
March is cold with highs of 5°C and lows of 0°C. Moderate rainfall (45 mm) and mostly overcast skies.
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April
April is cold with highs of 10°C and lows of 3°C. Moderate rainfall (38 mm) and partly cloudy skies.
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May
May is cool with highs of 16°C and lows of 8°C. Moderate rainfall (41 mm) and partly cloudy skies.
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June
June is cool with highs of 19°C and lows of 12°C. Moderate rainfall (55 mm) and partly cloudy skies.
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July
July is cool with highs of 21°C and lows of 13°C. Moderate rainfall (56 mm) and partly cloudy skies.
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August
August is cool with highs of 21°C and lows of 13°C. Moderate rainfall (52 mm) and partly cloudy skies.
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September
September is cool with highs of 17°C and lows of 10°C. The wettest month with 65 mm of rain and partly cloudy skies.
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October
October is cold with highs of 12°C and lows of 7°C. Moderate rainfall (58 mm) and mostly overcast skies.
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November
November is cold with highs of 7°C and lows of 3°C. Moderate rainfall (57 mm) and mostly overcast skies.
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December
December is cold with highs of 5°C and lows of 1°C. Moderate rainfall (57 mm) and mostly overcast skies.