vast minority | 18.05.2011 06:47 | World
The people's assembly there decided to keep meeting every night at 8pm and keep the street revolts going until at least Sunday (a day of local elections), with the view of staging an even bigger mobilisation on Friday and Saturday.
Similar scenes are unfolding across the country.
This enormous wave of protest, of which young people have been at the forefront, is clearly of huge significance for both Spain and Europe.
Despite this - or perhaps because of it - the movement is thus far receiving virtually no press coverage in the English-speaking world.
One of the few reports, on Euronews, stated: "Hoping to repeat the success of Egyptian people power, various groups in Spain have occupied Madrid’s main square of 'Puerta del Sol'.
"Students, workers and the unemployed have called their protests the May 15 movement signifying when they first came out onto the streets in 50 cities across the country.
"Like the Arab Spring activists they use twitter and the internet to rally support.
"Calling for fewer police and more education the demonstrators say their arms are their weapons.
"Discontent with Spain two-party system and the country’s high unemployment rate has galvanised the disparate groups.
"While mainly peaceful there have been some clashes with police and an several arrests."
Meanwhile details of the London solidarity protests have gone online at realdemocracylondonblogspot.com
Supporters of all nationalities are urged to meet at Sloane Square tube station at 7pm every night from Wednesday May 18 to Sunday 22 to march on the Spanish Embassy.