A collapse of Europe’s monetary union would likely lead to a breakup of the European Union as a whole, posing significant risks to the region and even raising the possibility of war in the long term, Poland’s Finance Minister told CNBC late on Thursday.

A tramway pass in the center of Warsaw on June 8, 2011. Poland and Ukraine will co-host the 2012 European Football Championship.

"If the euro zone were to fall apart then it's hard to exclude the possibility of EU falling apart as well," Polish finance minister Jacek Rostowski said in an interview.