The building you enter is the only one in the castle that still has an arch-shaped ceiling. However, a little more interesting is what you have under your feet - looking down you will see the castle treasury! Large chests filled with treasures, expensive jewelry and guarding them soldiers – all this to commemorate the fact that in the old centuries this stuff was held here.

During the reign of Władysław the Elbow, the crown treasury was moved here for a time. Then in 1318, Janisław, archbishop of Gniezno did the same with his treasures, hiding them here for fear of the Teutonic Order knights. There are banners in the vault, which also have their own meaning. At the foot of the Royal Castle in Chęciny on May 26, 1331, the congress of knighthoods of the then Polish worlds began, considered by some historians to be pioneering the development of noble parliamentarianism.

The descending knights therefore came in the presence of the banners of their principalities, led by voivodes and castellans. Just above your head hangs a cross, symbolizing the former castle chapel, bearing the call of Ten Thousand Holy Soldiers of Martyrs – quite typical for medieval fortresses. The kings did not therefore have to descend on the city's churches to pray in peace and quiet for the welfare of our homeland.