Domen
Misico dux Vandalorum
Spoiler :
Share with your friends, make this map more popular than the horribly wrong one that was posted.
IIRC Belarus has around 1.5 million Roman Catholics, yet the map shows entire country as Orthodox. They are mostly concentrated in western and northern regions of Belarus, being majority in some areas. On the other hand there is no Catholic majority in westernmost strip of Ukraine. There are no longer many Roman Catholics there. The highest concentration of Roman Catholics is in Zhytomyr Oblast - around 9%.
Percent of Roman Catholics by Oblast in 2010: