According to El País:
The demonstrations were a result of King Juan Carlos’ televised address at 1pm, in which he informed Spaniards of his decision to abdicate the Spanish throne in favor of his son Felipe.
The Madrid demonstration was quickly organized by leftist parties and associations…
Spain’s old republican flag…featured prominently in Madrid and elsewhere, as did references to the Spanish Communist Party and other leftist groups.
Hilario Montereo, a 68-year-old retiree, was one of the first protesters in Sol. “I am here to proclaim the Third Republic. A monarchy in the 21st century is an anachronism,” he said.
