Complex sentence: The organ was consecrated by Archbishop Tadeusz Kondrusiewicz of the Roman Catholic Archdiocese of Moscow on 16 January 2005, during a Mass, which was followed by the opening concert for the First International Festival for Organ Music.
Split into simpler sentences: The organ was consecrated by Archbishop Tadeusz Kondrusiewicz of the Roman Catholic Archdiocese of Moscow on 16 January 2005. The mass was followed by the opening concert for the First International Festival for Organ Music.