On May 15, a 5-party debate was held in Brussels, Belgium, for candidates who seek the Presidency of the European Commission. See this BBC story.
European Parliamentary elections are being held May 22-25. Voters in the European countries that are part of the European Commission do not actually vote for President of the Commission. Instead, the European Council nominates candidates for President, and then the Parliament chooses the president. However, the most important coalitions of political parties have already chosen their preferred presidential designate, and these are the five individuals who participated in the debate. The debate lasted 90 minutes and was broadcast in 24 languages. The coalition of conservative political parties did not choose a preferred presidential candidate, so it had no voice in the debate. Thanks to Thomas Jones for the link.