The re-installed organ — with 74 stops , 4 manuals and 5,563 pipes — was consecrated by Archbishop Tadeusz Kondrusiewicz of the Catholic Archdiocese of Moscow on 16 January 2005 . The mass was followed by the opening concert for the First International Festival for Organ Music . The month-long festival saw several organ concerts in the cathedral . The closing concert was performed by chief organist James Edward Goettsche from St. Peter 's Basilica . Organ and church music concerts take place regularly in the cathedral ; entry is normally free , except for selected concerts , for which admission is by ticket . A service in remembrance of those killed in the 2010 Polish Air Force Tu-154 crash was held on 12 April 2010
2010 Polish Air Force Tu-154 crash
2010 Polish Air Force Tu-154 crash
Cathedral of the Immaculate Conception (Moscow)