Collegium Ancora (a professional chamber choir that serves as ‘ensemble-in-residence’ at Grace Church in Providence) presents a concert featuring two works that exemplify the pinnacle of both a cappella and accompanied choral settings of the Mass Ordinary: Ralph Vaughan Williams’ Mass in G Minor for Soloists & Double Choir and Zoltán Kodály’s Missa Brevis for Choir & Organ. Collegium will be joined by prize-winning, Latvian-American organist, Dāvids Heinze for the Kodály mass.