Stravinsky's 1913 ballet which ushered in modern music was called

The Rite Of Spring

Explanation:

The innovative and complex rhythmic structures of music, the timbre and the use of dissonance made it an important part of twentieth century composition. Stravinsky used asymmetric rhythms, dissonance percussion, polyrhythmia, polytonality, and ostinati (persistently repeated ideas), as well as melodic fragments to create complex networks of interactive lines.

answer/// priests singing psalms and the congregation singing responses;

the longest time is 123 years