St. Mary's Basilica (Polish: Kościół Mariacki), is a Brick Gothic church built in the 14th century, adjacent to the Main Market Square in Kraków, Poland. Standing 80m (262ft) tall, it is particularly famous for its wooden altarpiece carved by Veit Stoss (Wit Stwosz).

On every hour, a trumpet signal — called the heynal (hejnał) — is played from the top of the taller of St. Mary's two towers. The plaintive tune breaks off in mid-stream, to commemorate the famous 13th century trumpeter, who was shot in the throat while sounding the alarm before the Mongol attack on the city. The noon-time hejnał is heard across Poland and abroad broadcast live by the Polish national Radio 1 Station. From wikipedia