The meeting, hosted by Jarosław Kaczyński, head of Poland's ruling Law and Justice (PiS) party, aimed to explore possible team-ups at the EU level, including an alliance within the European Parliament, Polish state news agency PAP reported.
Poland's Kaczyński told the gathering that the EU's most powerful member, Germany, was steering the bloc toward a super-state, which he said threatened to "bring about the rejection of the sovereignty of individual member states."
"This is not good news for Europe and the future of the EU," Kaczyński said, adding that "most European nations do not want to renounce their sovereignty."
The meeting, described as the "Warsaw summit," brought together politicians including Hungarian leader Viktor Orbán, Santiago Abascal from Spain's Vox grouping, and French far-right leader Marine Le Pen.
Poland's Prime Minister Mateusz Morawiecki also took part in the gathering, holding a number of face-to-face meetings on the sidelines of the event, public broadcaster Polish Radio’s IAR news agency reported.
Source: IAR, PAP