South Africa is holding a week of events to mark the passing of the anti-apartheid leader Archbishop Desmond Tutu, who died on Sunday aged 90.

The plans include two days of lying in state before an official state funeral on 1 January in Cape Town.

Tributes have been pouring in from leaders around the world, including Queen Elizabeth II, US President Joe Biden and Pope Francis.

Tutu was one of the country’s best known figures at home and abroad.

South African President Cyril Ramaphosa said in a statement that Tutu had helped bring about “a liberated South Africa”.

A contemporary of Nelson Mandela, Tutu was awarded the Nobel Peace Prize in 1984 for his role in the struggle to abolish the apartheid system enforced by the white minority government against the black majority in South Africa from 1948-91.

South Africans of all ages and backgrounds have been going to Cape Town’s St George’s Cathedral to lay flowers and pay tribute to the national hero.

Mourner Ellie Shortall said that without the role that people such as Tutu had played in South Africa’s liberation struggle, her own life would have been very different.

“I call my child a rainbow baby because we are a mixed couple. I was thinking yesterday that many years ago during apartheid we wouldn’t have been able to love each other, marry and have a baby,” she told the local Times Live news site.

“We would have done it in secrecy or would never have had an opportunity to fall in love.”

In honour of Tutu, the bells of the cathedral, the oldest in South Africa, will be rung daily at noon local time until Friday.

His remains will be cremated the next day and his ashes will be kept at the cathedral.

World leaders have been paying tribute.

President Biden said he was “heartbroken to learn of the passing of a true servant of God and of the people”, adding that Tutu’s “legacy transcends borders and will echo through the ages”.

Former US President Barack Obama described Tutu as “a mentor, friend and moral compass”.

In a message of condolence, Queen Elizabeth II said she remembered with fondness her meetings with him, and his great warmth and humour.

“Archbishop Tutu’s loss will be felt by the people of South Africa and by so many people in Great Britain, Northern Ireland and across the Commonwealth, where he was held in such high affection and esteem.”

Kenya’s President Uhuru Kenyatta said Tutu had “inspired a generation of African leaders who embraced his non-violent approaches in the liberation struggle”.

“Mindful of his service to the gospel through the promotion of racial equality and reconciliation in his native South Africa, his holiness commends his soul to the loving mercy of almighty God.”

The Nelson Mandela Foundation said Tutu’s “contributions to struggles against injustice, locally and globally, are matched only by the depth of his thinking about the making of liberatory futures for human societies”.

“He was an extraordinary human being. A thinker. A leader. A shepherd.”

Tutu’s death comes just weeks after that of South Africa’s last apartheid-era president, FW de Klerk, who died at the age of 85.

It is impossible to imagine South Africa’s long and tortuous journey to freedom – and beyond – without Archbishop Desmond Tutu.

While other struggle leaders were killed, or forced into exile, or prison, the diminutive, defiant Anglican priest was there at every stage, exposing the hypocrisy of the apartheid state, comforting its victims, holding the liberation movement to account, and daring Western governments to do more to isolate a white-minority government that he compared, unequivocally, to the Nazis.

When democracy arrived, Tutu used his moral authority to oversee the Truth and Reconciliation Commission that sought to expose the crimes of the white-minority government. Later he turned that same fierce gaze on the failings, in government, of South Africa’s former liberation movement, the ANC.

Many South Africans today will remember Tutu’s personal courage, and the clarity of his moral fury.

But as those who knew him best have so often reminded us, Tutu was always, emphatically, the voice of hope. And it is that hope, that optimism, accompanied, so often, by his trademark giggles and cackles, that seems likely to shape the way the world remembers, and celebrates, Archbishop Desmond Tutu.

Known affectionately as The Arch, Tutu was instantly recognisable, with his purple clerical robes, cheery demeanour and almost constant smile.

He was not afraid to show his emotions in public, including memorably laughing and dancing at the opening ceremony of the football World Cup in South Africa in 2010.

Despite his popularity, though, he was not a man who was loved by all. He was very critical of the African National Congress (ANC) government in the post-apartheid era, when, at times, he felt it was misrepresenting South Africa – even warning in 2011 that he would pray for its downfall over a cancelled visit by the Dalai Lama.

In response, the national police commissioner Gen Bheki Cele told Tutu to “go home and shut up”.

“He is not a vice-Jesus Christ,” he said.

Ordained as a priest in 1960, Tutu went on to serve as bishop of Lesotho from 1976-78, assistant bishop of Johannesburg and rector of a parish in Soweto. He became Bishop of Johannesburg in 1985, and was appointed the first black Archbishop of Cape Town the following year. He used his high-profile role to speak out against oppression of black people in his home country, always saying his motives were religious and not political.

After Mandela became South Africa’s first black president in 1994, Tutu was appointed to a Truth and Reconciliation Commission set up to investigate crimes committed by both whites and blacks during the apartheid era.

He was also credited with coining the term Rainbow Nation to describe the ethnic mix of post-apartheid South Africa, but in his latter years he expressed regret that the nation had not coalesced in the way in which he had dreamt.