St John's Cathedral (Katedra Sw Jana)
This stunning Gothic cathedral in the heart of Warsaw's Old Town is one of the most interesting historical landmarks. Built in the 14th century, St John's Cathedral - or Katedra Sw Jana - is one of the oldest churches in all of Poland, but was completely destroyed during World War II during the Polish Uprising. However, like much of the Old Town, it was reconstructed after the war, true to its original architecture.
In addition to being the site of many historical events, such as the coronation of the last Polish king, the cathedral also houses the beautiful red marble tombs of many Mazowian dukes, and its crypt is the resting place of many celebrated Poles such as Nobel Prize-winning author Henryk Sienklewicz. The Gothic architecture and artwork is some of the most impressive in Warsaw, and is not to be missed.
In the center of Old Town, getting to St. John's couldn't be easier. The 12, 13, 26, and 32 trams will leave you off right next to it at the Stare Miasto stop.
While the cathedral is open daily, they do not allow tourists to enter during mass, so be sure to check the mass schedule on the website when planning your visit.