Luiz Inacio Lula da Silva has been sworn in as the new president of Brazil, the third time he has held the country’s highest office.
Luiz Inacio Lula da Silva a left-wing politician, known widely as Lula, also led the country between 2003 and 2010 and defeated Jair Bolsonaro in October’s poll.
In his first speech, Lula vowed to rebuild a country in “terrible ruins”.
He decried the policies of his predecessor, who went to the US on Friday to avoid the handover ceremony.
There has been tight security for the ceremony amid fears Bolsonaro supporters may try to disrupt it.
A sea of Lula supporters gathered in front of Congress since early in the morning – decked out in the red colour of his Workers’ Party. They travelled to see their leader sworn in – but also for a celebration.
More than 60 artists – including Samba legend Martinho da Vila – were booked to perform on two giant stages decorated in the national flag as part of a music festival dubbed “Lulapalooza”.
“Love has won over hate,” read one banner carried by a man dressed as Lula – complete with a presidential sash.
“Brazil needed this change, this transformation,” said another backer of the incoming leader as she queued for Sunday’s festivities.
Luiz Inacio Lula da Silva and incoming Vice-President Geraldo Alckmin paraded through the city on an open-top convertible before proceeding to the Congress building – where the swearing-in occurred at the start of the formal inauguration ceremony.
The men have spent the past days selecting their cabinet and appointing supporters to key state owned businesses.
Shortly after being sworn in, Lula sought to instil a sense of hope in the people of Brazil and promised to “rebuild the nation and make a Brazil of all, for all”.
He pledged to undo the legacy of his predecessor’s government, which he said involved depleting funding for education, health and the conservation of the Amazon rainforest.
To huge cheers from those watching in Congress, he also promised to revoke Mr Bolsonaro’s controversial gun laws immediately.
Lula went on to state that his government would not be motivated by “a spirit of revenge”, but that those who had made mistakes would answer for their errors.
In particular, he singled out Mr Bolsonaro’s Covid-19 policies, accusing him of causing a “genocide” of deaths in Brazil during the pandemic, which would need to be fully investigated.
In another noted change of policy from the Bolsonaro administration, Marina Silva – one of Brazil’s best known climate activists – was re-appointed to head the environment and climate ministry. She will be expected to achieve Lula’s pledge – which was repeated during his speech – to reach “zero deforestation” in the Amazon by 2030.
The state of Brasilia has pledged to deploy “100%” of its police force – around 8,000 officers – to the city amid fears that some supporters of Mr Bolsonaro could seek to disrupt proceedings.
One man was arrested trying to enter the area of the inauguration carrying a knife and fireworks earlier on Sunday, Brazil’s military police said.
Mr Bolsonaro flew to the US state of Florida on Friday after delivering a teary farewell to supporters.
“We have a great future ahead,” he said in a social media video. “Battles are lost, but we will not lose the war.”
Last week, authorities arrested a supporter of Mr Bolsonaro who had allegedly placed explosives on a fuel truck near an airport in the capital on Christmas Eve. The man said he hoped to “sow chaos” ahead of Lula’s inauguration.
And other supporters of the former leader have remained camped outside army headquarters, where they have been urging the army to launch a coup. Police attempted to remove the demonstrators on Thursday, but withdrew after they reacted violently.
However, Mr Bolsonaro has condemned the protests against his defeat, urging his supporters to “show we are different from the other side, that we respect the norms and the Constitution”.