Friends and relatives of a Brazilian man have attended a Requiem Mass at Westminster Cathedral one week after he was shot dead by police.
A mass was held for Mr Menezes at Westminster Cathedral
Jean Charles de Menezes was shot eight times on a train after being mistaken for a suicide bomber.
The service was held to coincide with Mr Menezes' funeral in his home town of Gonzaga, Brazil.
Earlier on Friday, a vigil in Parliament Square was held for the 27-year-old.
Independent Police Complaints Commission (IPCC) investigators also visited Stockwell to appeal for witnesses.
Hundreds of people, including Mr Menezes' London-based family and friends, attended the Westminster mass conducted by Father Frederico Ribeiro, chaplain of the Brazilian community in the capital.
People queued up at the beginning of the service to sign books of condolence and a petition run by the Menezes family.
Black and white photos of Mr Menezes were placed around the cathedral with flowers underneath.
Bianca Jagger, goodwill ambassador from the Council of Europe, gave a reading at the start of the service.
She said his death had been "senseless" and that the Fifth Commandment forbade the killing of the innocent and the righteous.
"There was nothing evil about Jean Charles. His only crime was to be in the wrong place at the wrong time, and perhaps the colour of his skin."
Ms Jagger added that people needed to work together so that a death sentence was not handed down "on the streets of London".
A family friend of Mr Menezes told the congregation that he had been a "helpful, lovely person".
Jean Charles de Menezes' body has been returned to Brazil
"We miss him, we miss his voice but he will live on in our hearts forever," the friend said.
Cardinal Cormac Murphy-O'Connor, the Archbishop of Westminster, read a message at the end of the service.
He said: "Jean Charles came to this country, like so many of our immigrant people, in search of a better life.
"He came to educate himself, to support himself and his family and maybe to return to Brazil one day."
But he added: "He became a Londoner and that's how we in London will remember him."
He said it was important to learn from Mr Menezes' death.
A spokesman said the cardinal had felt it was important to accompany the "angry and grieving" Brazilian Catholic community at the funeral.
Earlier, in Parliament Square, Mr Menezes' cousin Alessandro Pereira appealed for help in the family's quest for justice.
He said: "This death could so easily have happened to somebody else's brother, father or cousin. I hope no other family suffers as we have suffered."
Family and friends of Mr Menezes laid flowers and messages of support outside south London's Stockwell Tube station, where a makeshift shrine was erected.
On Thursday the Home Office said the visa of Mr Menezes expired two years before he was shot by police.
A passport stamp apparently giving him indefinite leave to remain "was not in use" on that date, added officials.
But the IPCC, which is overseeing the official investigation into the death, criticised the Home Office for releasing the information.
IPCC chairman Nick Hardwick said: "It's entirely irrelevant information. I'm rather surprised the Home Office should issue it."
"We won't be releasing partial information until we've independently established the facts."
Some of the dead man's relatives have questioned the police account of events and called for the banning of the Met's "shoot to kill" policy for suicide bombers.
Scotland Yard has admitted Mr Menezes was not connected to the attacks.
Metropolitan Police chief Sir Ian Blair has apologised to his family but defended the force's policy as the "only one way to stop someone who is a suicide bomber".