At the top there is a bas-relief featuring St. Thomas the Apostle (the town’s saint patron), kneeling in front of Christ. On both sides of the building there are cartouches with the Zamoyski family coat of arms. Below there is an inscription in Latin that reads: „Vanquisher of sin, hell and death repulse the fierce attacks of all our enemies”. In the side walls there are slanting embrasures for shooting or keeping a watch.