Through which medieval countries did the carpathian mountains extend? ?

The Carpathian Mountains are the range(chain) of a mountain in the Central and Eastern Europe. In the Medieval ages, the mountains covered Moldavia, Wallachia, Hungary and Poland. The Carpathian Mountains played an important in Wallachia and Moldavia (Romania) by defending the country from its enemies from attacking them. Most of the castles, fortresses, positioned on top of cliffs and hills to provide a better view of the area and to defend against invaders.    

The Carpathians consist of a chain of mountain ranges that stretch in an arc from the Czech Republic(3%) in the northwest through Slovakia (17%), Poland(10%), Hungary (4%) and Ukraine (11%) to andRomania (51%).

Not all the of them have Old and New Testaments. Not all three require you to learn Arabic. 

"A". 'The three religions all believe in one god. <- this is true 

Christianity believes in a God. Judaism believes in the same God, just not his son. Isalm believes in Allah. 

I hope this helps!
~kaikers