The tower's walls reach a thickness of up to 4.7 meters at the base to withstand cannon fire.
The name 'Fat Margaret' likely refers to the tower's sheer mass rather than any historical individual.
The 15th-century Cog wreck featured in the exhibit was recovered from the Tallinn harbor floor during construction work.
The tower historically served as a prison, with graffiti from inmates still visible in some sections.
The roof terrace offers one of the few vantage points to see the entire layout of the Tallinn harbor.
The museum structure integrates seamlessly with the Great Coastal Gate, a medieval entrance to the city.
The building was extensively renovated in 2019 to better accommodate the massive shipwreck display.
The museum collection includes over 700 nautical items ranging from ancient tools to engine models.
The display floor for the Cog wreck was specifically engineered to support the 700-year-old timber structure's weight.
During the 1917 February Revolution, the tower was set on fire and largely gutted.
Fat Margaret is a 16th-century artillery tower converted into a modern maritime museum housing Estonia's oldest shipwreck. The building is part of a UNESCO World Heritage site and served historically as a defensive bastion and prison. The collection centers on the 700-year-old Cog wreck discovered in Tallinn in 2015. Visitors move through multiple levels of the circular tower via stairs and elevators to view maritime artifacts. The museum covers the evolution of Estonian shipping, from Hanseatic trade to Soviet-era vessels. A rooftop garden provides panoramic views of the Tallinn Old Town and the port area. The architecture preserves original limestone walls alongside contemporary industrial-style glass and steel interventions. It remains one of the most significant defensive structures in the Tallinn city wall system.
From the rooftop terrace looking toward the Port of Tallinn, or from the Great Coastal Gate looking up at the tower facade.
Use the elevator to reach the roof terrace for the best harbor views without climbing the spiral stairs.
Check the 'Cog' ship display first, as it is the central architectural anchor of the museum.
Visit the small garden area near the entrance to view the tower's foundation and massive exterior walls up close.
Trying to climb the original stone staircases if you have mobility issues; use the internal modern elevators.
Closed on Mondays during the winter season.
