The fortress base was originally a wooden 15th-century lighthouse before being encased in brick fortifications.
During the 17th century, the fort housed a garrison that controlled the entrance to the Gdańsk port, often forcing incoming merchant ships to pay tolls.
The central tower, once a lighthouse, still contains the original foundations that helped guide vessels through the treacherous Vistula river mouth.
The fortress survived the massive destruction of the 1945 Battle of Gdańsk relatively intact compared to the city center.
The fort was used as a prison during the Napoleonic Wars and as a POW camp during the later stages of World War II.
It features a unique 'Fort Carré' design, a Dutch-style star-shaped fortification intended to deflect artillery fire.
The walls still contain visible marks and damage from centuries of maritime weather and occasional military sieges.
Wisłoujście Fortress is a unique maritime fortification located at the mouth of the Martwa Wisła River, serving as the only preserved Renaissance fortress in Poland. The site consists of a central brick tower surrounded by a circular fort (the Fort Carré) and four bastions. It originally served as a strategic lookout point for ships entering the Gdańsk harbor and as a lighthouse. The complex underwent extensive military expansions in the 17th century under Dutch influence. Visitors can access the courtyard, the underground casemates, and the observation deck at the top of the tower. It currently operates as a branch of the Museum of Gdańsk. The site is a rare example of a complex that functioned as both a defensive military installation and a coastal navigation beacon.
The view of the brick tower from the center of the interior courtyard provides the best architectural perspective.
Wear sturdy, comfortable footwear as the flooring inside the stone towers and bastions is uneven and often steep.
Bring a light jacket as temperatures drop significantly within the thick-walled casemates and underground sections, even in summer.
Check the schedule before arrival, as some parts of the fortress, particularly the upper tower, may be closed during periods of high winds or bad weather.
Do not attempt to climb the exterior walls or walk on the moat embankments, as these are unstable and restricted.
Open seasonally from spring through autumn; closed on Mondays. Entirely closed during winter months due to safety and climate conditions.
Maintain respectful behavior in the historical casemates; stick to marked paths to preserve the integrity of the archaeological site.
