Over the past decade or so, the European Union has weathered the global financial crisis, a migrant crisis, and the rise of populist nationalism. Sure, it's taken its fair share of bumps and bruises along the way, but the idea of a largely borderless Europe united by common democratic values has survived more or less intact.
Then came the coronavirus. The global pandemic, in which Europe is now one of the two main epicentres, is a still-spiralling nightmare that could make those previous crises look benign by comparison. Here are a few different ways that COVID-19 is severely testing the 27-member bloc:
The economic crisis: Lockdowns intended to stop the virus' spread have brought economic activity to a screeching halt, and national governments are going to need to spend a lot of money to offset the impact. But some EU members can borrow those funds more easily than others. Huge debt loads and deficits in southern European countries like Italy and Spain, which have been hardest hit by the outbreak so far, make it costlier for them to borrow than more fiscally conservative Germany and other northern member states. In the aftermath of the global financial crisis, this imbalance nearly led the bloc's common currency, the Euro, to unravel.