Jiri Prochazka made history Saturday night -- becoming the first Czech fighter to win a UFC championship -- and thousands of delirious fans showed up to greet the home country hero on Monday.
29-year-old Prochazka was losing his UFC 275 title fight with Glover Teixeira ... but somehow, someway managed to get the 42-year-old champ's neck and force the tap-out with 28 seconds left in the 5-round fight.
The win made Jiri the first Czech-born champ ... and when the newly crowned champ arrived back in his hometown in Brno, there was a huge crowd waiting to give him a hero's welcome!