Church of Our Lady Assumed into Heaven (St. Mary's Church) - is a Brick Gothic church re-built in the 14th century (originally built in the early 13th century), adjacent to the Main Market Square in Kraków, Poland. Standing 80 m (262 ft) tall, it is particularly famous for its wooden altarpiece carved by Veit Stoss (Wit Stwosz).

Every hour on the half hour, a trumpet signal—called the Hejnał mariacki—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.