The Spanish government has said it would welcome the participation of sacked Catalan leader Carles Puigdemont in new elections.
The central government in Madrid has ordered that fresh elections for the regional parliament of Catalonia should take place in December.
It stripped Catalonia of its autonomy after the Catalan parliament voted to declare independence.
Mr Puigdemont is urging “democratic opposition” to direct rule from Madrid.
He condemned the suspension of Catalonia’s autonomy and promised to continue to “work to build a free country”.
Spain has been gripped by a constitutional crisis since an independence referendum, organised by Mr Puigdemont’s separatist government, was held earlier this month in defiance of a ruling by the Constitutional Court which had declared it illegal.
The Catalan government said that of the 43% of potential voters who took part, 90% were in favour of independence.
Friday saw the regional parliament declare independence, with Madrid responding by declaring the move illegal.
Prime Minister Mariano Rajoy then announced the dissolution of the regional parliament and the removal of Mr Puigdemont as Catalan leader, and ordered that fresh regional elections should be held.
What are the latest developments?
Saturday saw the government in Madrid remove Catalonia’s autonomy and take over government functions in the region.
An official state bulletin (in Spanish) handed control of Catalonia to Spain’s Deputy Prime Minister, Soraya Saenz de Santamaria.
And Spain’s interior ministry took charge of Catalonia’s police after firing senior Catalan police officials.
A central government spokesman in Madrid, Íñigo Méndez de Vigo, said Mr Puigdemont had the right to continue in politics, despite his removal from office.
“I’m quite sure that if Puigdemont takes part in these elections, he can exercise this democratic opposition,” he said, quoted by Reuters.
“The Catalans will be able to say what they feel about what they’ve been seeing in this last year, with all sorts of failing the law, abusing the law and putting themselves outside the law,” he added.
He spoke after Mr Puigdemont, in a pre-recorded address to Catalans on Saturday afternoon, said the central government’s actions were “premeditated aggression” that ran “contrary to the expressed will of the citizens of our country, who know perfectly well that in a democracy it is parliaments that choose, or remove, presidents”.
He added: “We continue persevering in the only attitude that can make us winners. Without violence, without insults, in an inclusive way, respecting people and symbols, opinions, and also respecting the protests of the Catalans who do not agree with what the parliamentary majority has decided.”
A poll published by Spanish national newspaper El Pais on Saturday suggests more Catalans (52% to 43%) are in favour of the dissolution of the regional parliament and the holding of elections.
Fifty-five per cent of Catalan respondents opposed the declaration of independence, with 41% in favour.
What powers did Catalonia have?
Before Madrid took over the Catalan government, the region had one of the greatest levels of self-government in Spain.
It has its own parliament, police force and public broadcaster, as well as a government and president, though those have now been dismissed.
Catalans had a range of powers in many policy areas from culture and environment to communications, transportation, commerce and public safety.
Foreign affairs, the armed forces and fiscal policy were always the sole responsibility of the Spanish government.
What’s the reaction been?
Thousands celebrated Friday’s declaration of independence on the streets of Barcelona, Catalonia’s regional capital.
The same crowds that cheered each Yes vote from Catalan MPs reportedly booed Mr Rajoy as he made his announcement.
There were pro-unity demonstrations too, with protesters in Barcelona waving Spanish flags and denouncing Catalan independence.
Saturday saw several thousand people attend a rally in Madrid, waving Spanish flags and calling for national unity. Some accused Catalonia’s leaders of treason.
How did we get here?
After the 1 October referendum, Mr Puigdemont signed a declaration of independence but delayed implementation to allow talks with the Spanish government.
He ignored warnings by the Madrid government to cancel the move, prompting Mr Rajoy to threaten to remove Catalan leaders and impose direct rule.
Catalonia is one of Spain’s richest, most distinctive regions, with a high degree of autonomy.
Many Catalans feel they pay more to Madrid than they get back, and there are historical grievances, too, in particular Catalonia’s treatment under the dictatorship of General Franco. But Catalans have been divided on the question of independence.
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