St Mary's Church off of Krakow's central market. Each hour a trumpeter plays the Hejnal four times in four directions out of the tower in the church. The piece finishes abruptly at the point when a bugler playing the piece to warn of a Tatar invasion was killed. It has been played four times every hour nearly unbroken since 1241. It is a very haunting piece, particularly so in the quiet of the night.