A plaque to commemorate 17 Norwich Jews killed during 12th century blood libel riots was unveiled on Monday.

The Lord Mayor, Councillor Judith Lubbock, led the memorial for the six adults and 11 children, who are believed to have come from the same family. Their remains - discovered in a well shaft during construction of a shopping centre in 2004 - were buried in the local Jewish cemetery in 2013 in five boxes covered by a tallit.

In 1144, Norwich Jews were blamed for the death of a 13-year-old boy - the first blood libel case in Britain. As well as honouring victims of the subsequent massacre, the plaque at the shopping centre site also serves as "an act of reconciliation for the persecution of the Jewish community in medieval Norwich".

Clive Roffe, who represents Norwich on the Board of Deputies, said the ceremony was "very moving", with 150 Christians and Jews coming together to honour the dead.

"It was the Christian community who were anxious to have the plaque as an act of reconciliation for what happened all those years ago. It's in a central location where millions of people will see it each year," he explained.

"We hope that this act of respect and reconciliation may, in some small way, help to bring peace and understanding to all faiths."