The Leave vote in the UK is a huge body blow for the EU - already reeling from the migrant crisis, the euro crisis and fears about what is seen as an aggressive Russia next door.
Brexit could prove to be the biggest blow yet. It sends shockwaves far beyond British borders.
The UK gave the EU a second seat at the UN Security Council, one of only two serious military forces (alongside France), respected diplomatic expertise and a driving force behind making the single market more competitive.
All that will now disappear from the EU display cabinet.
And as Britons anxiously scan the markets, watching the effect of Brexit on the pound, Europeans fear for the future of what had been a nervously recovering euro.