Thousands erupted on Saturday night in Madrid where they gathered in front of the Spanish parliament, protesting against anti-protest law, the new Law that reduces rights and freedom.
Resistencia 25S is the organizer (video spanish). They started September 25th last year with a similar protest. Also in April also organised a protest.
Surrounding the Congress in Twitter
#14D
#RodeaElCongreso
Spaniards working abroad, movilizating around Marea Granate, also participated from their countries
Video (english)
Video 2 (spanish)
More than two dozen were injured as Congress protest turn violent (El Pais)