All eyes in Europe are on Greece after 61 percent of Greeks voted against reform proposals from creditors, which entailed austerity measures and many spending cuts.
The vote has put Greece in unknown political and economic territory, with a potential exit from the single currency now more likely than ever.
Euro zone leaders are to meet at a summit on Tuesday to discuss their next move.
Read MoreGreece's 'nays' have it - how markets will react
The Greek stock market remained closed on Monday, as did banks in the country. Capital controls are still in place, but whether the European Central Bank (ECB) will maintain its emergency funding for Greek banks is uncertain.
Greek Finance Minister Yanis Varoufakis stepped down on Monday, saying in a blog post that he was was "made aware of a certain preference by some Eurogroup participants, and assorted 'partners', for my… 'absence' from its meetings."
Read MoreWhy Angela Merkel won't back down on Greece: Fisher
There were no major European earnings or data releases Monday.