In 1241 Mongol armies rode through the Kingdom of Hungary and destroyed its army in a single afternoon. Nothing is recorded of what happened in the Turiec itself, but the consequences reached it: King Béla IV rebuilt the kingdom around stone castles and handed out land to men who would hold them, and his successors carried on doing it. In 1281 King Ladislaus IV granted the Háj estate, together with its hot springs, to a Count Peter. That charter is the first time the water under this town appears in writing — which means the springs were already known and worth giving away.V roku 1241 prešli Uhorskom mongolské vojská a kráľovskú armádu rozprášili za jediné popoludnie. O tom, čo sa dialo priamo v Turci, sa nezachovalo nič, ale následky sem dorazili: kráľ Belo IV. začal krajinu opevňovať kamennými hradmi a rozdával pôdu tým, čo ich mali držať — a jeho nástupcovia v tom pokračovali. V roku 1281 daroval kráľ Ladislav IV. hájske panstvo aj s teplými prameňmi grófovi Petrovi. Táto listina je prvou písomnou zmienkou o vode, na ktorej mesto stojí — čiže pramene už vtedy poznali a stálo za to darovať ich.
