On 7 December 2006, Litvinenko was buried within a lead-lined casket at Highgate Cemetery with Christian, Jewish and Muslim rites, including a Christian and Muslim prayer being said by an imam and Orthodox priest in line with Litvinenko's wishes of a non-denominational service. The ceremony was followed by a private memorial at which the ensemble Tonus Peregrinus sang sacred music by Russian composers Igor Stravinsky and Sergei Rachmaninov.