Protesters gather at the Puerta del Sol square in Madrid, on May 19, 2011 during a protest against Spain's economic crisis and its sky-high jobless rate. #

Protesters take part in a demonstration with a banner that reads "System Error", in Madrid, on May 17, 2011. #

Protesters gather at the Puerta del Sol square in Madrid on May 19, 2011. #

Protesters gather under tents at the Puerta del Sol square in Madrid on May 19, 2011 during a protest against Spain's economic crisis and its sky-high jobless rate. #

A woman takes pictures during a demonstration in Madrid, on Wednesday May 18, 2011. #

A man is arrested after clashing with police during a demonstration in Madrid, on Sunday May 15, 2011. #

Demonstrators raise their hands during a protest against politicians, bankers and authorities' handling of the economic crisis in central Valencia, on May 19, 2011. #

Demonstrators, one of them wearing an Anonymous group mask, attend a demonstration in Madrid, on May 15, 2011. #

Tents and protesting Spaniards are seen during a rally on Puerta del Sol square on May 19, 2011 in Madrid, Spain. #

Demonstrators shout slogans next to police during a protest calling for "Democracia Real , Ya! (Real Democracy, Now!)" in Malaga, southern Spain, on May 15, 2011. #

Demonstrators occupy the Puerta del Sol square in Madrid, early on May 20, 2011. #

Demonstrators shout slogans as they take part in a protest in Madrid, on Thursday, May 19, 2011. #

Protesters gather and shout slogans in Madrid's famous landmark Puerta del Sol, on May 18, 2011. #

General view of the occupied Puerta del Sol square in Madrid, on May 19, 2011 during a protest against Spain's economic crisis. #

Demonstrators in tents spend the night at Puerta del Sol square during a protest in Madrid, on Friday May 20, 2011. #

A woman stands in sunlight during a protest in Puerta del Sol square in Madrid, early on May 20, 2011. #

Demonstrators sweep up trash in a camp in Madrid's Puerta del Sol square, during a protest on May 20, 2011. #

A couple shares a moment during a protest occupation of Puerta del Sol square in Madrid, early on May 20, 2011. #

A woman reads a newspaper article with a headline that reads "The indignant are organized" during a protest at Barcelona's Plaza de Catalunya, on May 17, 2011. #

Demonstrators shout slogans as they protest during a rally called by "Real Democracy Now" in Barcelona, Sunday, May 15, 2011. #

A placard saying "be outraged" hangs above protesters during a protest rally in the Plaza Arriaga in Bilbao, on May 19, 2011. #

Demonstrators fill Madrid's Puerta del Sol square during a protest on May 19, 2011. #

Demonstrators listen to a speaker in Madrid's Puerta del Sol square, on May 20, 2011. #

A demonstrator holds flowers during continued protest at Sol Square camp on May 20, 2011 in Madrid, Spain. #

Demonstrators gather at Metropol Parasol in the Andalusian capital of Seville, Spain, on May 20, 2011. #

A demonstratror stands behind a banner hanging above Puerta del Sol square on May 20, 2011 in Madrid, Spain. #

Demonstrators raise their hands as they shout slogans during a protest at Puerta del Sol square, in Madrid, on Friday May 20, 2011. #

Protestors gather in the Puerta del Sol square camp on May 20, 2011 in Madrid, Spain. #

Demonstrators raise their arms just after midnight as they fill up Madrid's Puerta del Sol early May 21, 2011 . #

Demonstrators raise their arms as they fill up Madrid's Puerta del Sol just after midnight, early May 21, 2011. #

Protesters gather just after midnight, filling up Madrid's Puerta del Sol square, spilling into sidestreets early on May 21, 2011. #