Thousands march through the streets of Madrid.
They are protesting against austerity, high unemployment and political corruption, after more than four years of government cutbacks.
Many feel these measures have done little to help those at the bottom of society.
(SOUNDBITE) (Spanish) PROTESTER AND STUDENT IN MADRID, KARLA, SAYING:
"We want a viable country in order to be able to have life projects. We want to recover public services, we want to recover the universal health care we used to have. We want a dignified life in this country. The youth jobless rate is 54 percent in this country. This is shameful."
Corruption scandals, including the discovery that a health minister had taken kickbacks, have driven many on to the streets.
They've also pushed voters into the arms of the new radical Podemos party which has raced ahead in opinion polls since being formed just ten months ago.
With an election coming up next year, Spain's ruling conservative