The find of more than 800 years old may help unthread the riddle of the Kalozha church – the monument of the Grodno architecture school. A fingerprint of its possible builder has been found on a plinthiform brick. As experts of the State forensics committee and regional Investigation committee say, the fingerprint was left by a heavy-built man aged about 30. The research of the fingerprint is important, as no information about the builders of the legendary 12-th century shrine has been left till nowadays.