2010 marks the 400th anniversary of Claudio Monteverdi’s VESPERS OF 1610. The monumental sacred work will be celebrated throughout the year, including a performance at New York City’s Cathedral of St. John the Divine on March 6 by Boston Baroque. Their 1998 recording received a Grammy nomination for Best Performance of a Choral Work. The period instrument group’s founder and director, Martin Pearlman, discusses Monteverdi’s masterpiece.