At one corner of Rynek Glowny, there stands the Mariaki Church (St. Mary's Basilica). The spires are uneven because they were built by two brothers, each trying to outdo the other. Every hour, from the spire on the left, a solitary trumpeter plays a short melody, stopping 5 notes into the second refrain to commemorate the time of the Mongol invasion when the trumpeter was shot through the neck with an arrow, mid-refrain.