The musician that composed over 100 masses and directed all music for the Vatican?

The musician who composed over 100 masses and directed all music for the Vatican was Giovanni Pierluigi da Palestrina. Active during the Renaissance, Palestrina is celebrated for his contributions to sacred music and is often credited with perfecting the polyphonic style. His compositions were crucial in shaping the musical practices of the Catholic Church, and his work continues to influence choral music today.