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)