Earlier this month the club announced a new approach to tackling racism and antisemitism among its supporters, after a number of embarrassing incidents in recent years.
Mr Abramovich, who is Jewish, is thought to be behind the drivem which will aim to “educate and rehabilitate” offenders, rather than issue stadium bans, which have not proved effective, the club has said.
Diane Lees, director general of the IWM, said: “This donation will enable IWM to reinterpret these galleries, which will present critical insights into the Holocaust as well as integrate the devastating events of the Holocaust into the broader history of the Second World War, revealing why this often overlooked dimension is so important.”
The Holocaust Galleries’ opening has been overshadowed by the government’s proposal for a national Holocaust Memorial and Learning Centre outside parliament in Westminster.
The IWM urged a re-think of the memorial and learning centre earlier this month, warning it would “very much divide the public offer on learning about the Holocaust.”
Elsewhere, the prominent Dangoor family has donated £5 million to Imperial College London to fund its world-leading cancer research centre.
David, the businessman son of Sir Naim Dangoor, and Elie Dangoor, announced the donation this week, saying the family is a “robust supporter of creating space for education and discovery”.