thumb|right|Royal Chapel of the Polish King – John III Sobieski was built in baroque style between 1678 and 1681 by Tylman van Gameren. thumb|St. Mary's Church – one of the largest brick churches in the world thumb|Polish Post Office, site of the 1939 battle Gdańsk has a number of historical churches, including St. Catherine's Church and St. Mary's Church (Bazylika Mariacka). This latter is a municipal church built during the 15th century, and is one of the largest brick churches in the world. The city's 17th-century fortifications represent one of Poland's official national Historic Monuments (Pomnik historii), as designated on 16 September 1994 and tracked by the National Heritage Board of Poland.
thumb|right|Royal Chapel of the Polish King – John III Sobieski was built in baroque style between 1678 and 1681 by Tylman van Gameren. thumb|St. Mary's Church – one of the largest brick churches in the world thumb|Polish Post Office, site of the 1939 battle Gdańsk has a number of historical churches, including St. Catherine's Church and St. Mary's Church (Bazylika Mariacka). This latter is a municipal church built during the 15th century, and is one of the largest brick churches in the world. The city's 17th-century fortifications represent one of Poland's official national Historic Monuments (Pomnik historii) as designated on 16 September 1994 and tracked by the National Heritage Board of Poland.