Jaroslaw Kaczynski has long insisted Poland wants to remain rooted in the European Union, but has rejected any notion of the "multi-speed EU" favoured by powerhouse states Germany and France.
As central Europe's largest economy, Poland is concerned that as one of nine of the EU's current 28 members outside the eurozone, it could be left behind should countries in the currency bloc push ahead with integration.
"We cannot accept any kind of declarations about a two-speed Europe," Kaczynski, the leader of Law and Justice (PiS) and widely regarded as the country's de facto decision-maker, told the rightwing wSieci weekly.
EU leaders meet at the March 25 summit in Rome to mark the EU's 60th birthday, a moment they hope to emphasise the bloc's unity as Britain is expected to trigger Article 50 of the EU's Lisbon Treaty, starting a two-year countdown to Britain's departure.
"A two-speed Europe would mean that the money would be concentrated in the West, among other reasons because Germany will have to pay more to cover the debts of the euro area," Kaczynski said.
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