Police and protesters clashed in Spain, Italy and Portugal as millions of workers went on strike to challenge to austerity policies.
As well as strikes across Europe, today has also produced figures that may convince people at the top that austerity is self-defeating.
David Cameron has promised to investigate the closure of a centre that has helped thousands of people overcome their disabilities.
Hundreds of thousands of protesters are on the streets of Madrid tonight. Their message to their leaders is that not only is austerity not working, but that it's making things worse.
That message is supported by dreadful economic figures today that show accelerating recession in southern Europe and big falls in manufacturing output.
All the focus, certainly in Brussels and Berlin, is on saving the Euro and avoiding the catastrophe that they think would follow a collapse of the currency.
But leaders in cities like Madrid have to see what their people are doing and saying. Much more of protests like today's, and this country could become ungovernable.
Left-leaning Spanish news organisation La Tuerka claims its photographer was "assaulted and arrested by police" at a protest march in Madrid.
It uploaded this footage of the incident:
Tens of thousands of people are out on the streets of Barcelona protesting against the austerity cuts.
There are lots of families, students and union members. Plenty of firecrackers are going off but everything appears peaceful.
Footage uploaded by YouTube user CrisisEsVacuidad shows protesters clashing with riot police on Madrid's Gran Vía this morning.
Today some flights will be affected by the strikes in Europe. Please check with your airline.
Travellers have been faced with delays and cancellations today as a series of General Strikes take place across Europe. British Airways and easyJet are among the airlines forced to cancel flights from the UK.