Protests have reached the second day after Catalan politicians and activists received between nine and 13 years for sedition and misuse of public funds related to the 2017 independence referendum.
Carles Puigdemont's speech was met with cheers from the crowd.
The Spanish constitutional court has suspended the vote and the central government considers it to be illegal.
There is evidence to support a role for the Russian propaganda machine in playing up the tensions in the region.
The Spanish government accused the region's parliament of committing a 'constitutional and democratic atrocity.'