Attraction in Gdańsk

St. Catherine's Church

St. Catherine's Church is the oldest church in Gdańsk and the burial place of astronomer Johannes Hevelius. Its bell tower holds the Museum of Tower Clocks, home to the world's first pulsar clock.

Reviewed and updated July 2026

St. Catherine's Church (Kościół św. Katarzyny) is the oldest church in Gdańsk, a brick building with roots in the 13th and 14th centuries in the Old Town (Stare Miasto). People come for its long history, its bell tower housing the Museum of Tower Clocks, and its link to the astronomer Johannes Hevelius, who is buried here.

The bell tower and the Museum of Tower Clocks

The church's bell tower holds the Museum of Tower Clocks, a branch of the Museum of Gdańsk. Inside you climb through levels of mechanisms that once measured time across the city, from older tower movements to the technology that followed. The tower doubles as a viewpoint over the Old Town rooftops. Check the Museum of Gdańsk official channels for current opening times and tower access before you go.

Johannes Hevelius and the pulsar clock

The astronomer Johannes Hevelius (1611-1687), who mapped the surface of the Moon and catalogued stars from his own Gdańsk observatory, is buried in this church. In 2011, to mark the 400th anniversary of his birth, the world's first pulsar clock was installed here. Rather than a pendulum or quartz crystal, it keeps time using signals from pulsars, the rapidly spinning neutron stars whose regular pulses act as a natural cosmic timekeeper.

The oldest church in the city

As the oldest church in Gdańsk, St. Catherine's carries centuries of the city's religious and civic life in its brickwork. Its origins in the 13th and 14th centuries make it a starting point for understanding how the medieval town grew. The building has survived war, fire and reconstruction over its long life, and it remains an active place of worship as well as a site visitors explore.

Fitting it into a Gdańsk visit

St. Catherine's sits in the Old Town, so it pairs naturally with a wider walk through the historic centre and the nearby waterfront. The clock museum and the Hevelius connection make it a good stop for anyone interested in science and astronomy as much as architecture. See our Gdańsk guide for other places to combine it with on the same day.

Good to know

The bell tower and its Museum of Tower Clocks are the main draw for visitors, so confirm tower opening times with the Museum of Gdańsk before arriving.

Frequently asked questions

The astronomer Johannes Hevelius (1611-1687), known for his lunar maps and star catalogues, is buried in St. Catherine's Church in Gdańsk.

Installed in 2011 for the 400th anniversary of Hevelius's birth, it is the world's first pulsar clock, keeping time using signals from pulsars, which are neutron stars.

Yes. St. Catherine's Church has origins in the 13th and 14th centuries, making it the oldest church in the city.

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