Dozens of ex-Synagogue Church of all Nations members - five British - allege atrocities, including rape and forced abortions, by Nigeria's late TB Joshua.
The allegations of abuse in a secretive Lagos compound span almost 20 years.
The Synagogue Church of All Nations did not respond to the allegations but said previous claims have been unfounded.
TB Joshua, who died in 2021, was a charismatic and hugely successful preacher and televangelist who had an immense global following.
The BBC's findings over a two-year investigation include:
- Dozens of eyewitness accounts of physical violence or torture carried out by Joshua, including instances of child abuse and people being whipped and chained
- Numerous women who say they were sexually assaulted by Joshua, with a number claiming they were repeatedly raped for years inside the compound
- Multiple allegations of forced abortions inside the church following the alleged rapes by Joshua, including one woman who says she had five terminations
- Multiple first-hand accounts detailing how Joshua faked his "miracle healings", which were broadcast to millions of people around the world
One of the victims, a British woman, called Rae, was 21 years old when she abandoned her degree at Brighton University in 2002 and was recruited into the church. She spent the next 12 years as one of Joshua's so-called "disciples" inside his maze-like concrete compound in Lagos.
"We all thought we were in heaven, but we were in hell, and in hell terrible things happen," she told the BBC.
Rae says she was sexually assaulted by Joshua and subjected to a form of solitary confinement for two years. The abuse was so severe, she says she attempted suicide multiple times inside the compound.
The Synagogue Church of All Nations [Scoan] has a global following, operating a Christian TV channel called Emmanuel TV and social media networks with millions of viewers. Throughout the 1990s and early 2000s, tens of thousands of pilgrims from Europe, the Americas, South East Asia and Africa travelled to the church in Nigeria to witness Joshua performing "healing miracles". At least 150 visitors lived with him as disciples inside his compound in Lagos, sometimes for decades.
Rae spent 12 years in Joshua's compound
More than 25 former "disciples" spoke to the BBC - from the UK, Nigeria, US, South Africa, Ghana, Namibia and Germany - giving powerful corroborating testimony about their experiences within the church, with the most recent experiences in 2019. Many victims were in their teens when they first joined. In some of the British cases, their transport to Lagos was paid for by Joshua, in co-ordination with other UK churches.
Rae and multiple other interviewees compared their experiences to being in a cult.
Jessica Kaimu, from Namibia, says her ordeal lasted more than five years. She says she was 17 when Joshua first raped her, and that subsequent instances of rape by TB Joshua led to her having five forced abortions while there.
"These were backdoor type… medical treatments that we were going through… it could have killed us," she told the BBC.
Other interviewees say they were stripped and beaten with electrical cables and horse whips, and routinely denied sleep.