KarlÅ¡tejn is a market town in Beroun District in the Central Bohemian Region of the Czech Republic. It has about 800 inhabitants. It is knoâŠKarlÅ¡tejn is a market town in Beroun District in the Central Bohemian Region of the Czech Republic. It has about 800 inhabitants. It is known for the KarlÅ¡tejn Castle, which is among the most visited tourist destinations in the country.