Named a UNESCO World Heritage Site in 1978, the current structure was consecrated in 1320 after being rebuilt from the foundation of the original church, which was destroyed during a Tatar invasion. The most prominent features of the exterior are the two, uneven towers. During the 15th century, the northern tower was added on to and was designed as the city’s watchtower, though today it's better known as the Bugle Tower. The interior, on the other hand, is a work of art with its elaborately carved altarpiece, stained-glass windows, and starry blue ceiling. This is a must-see during your visit to Kraków and some tour operators offer skip-the-line privileges.