Answer
St. Peter's Basilica was the renowned basilica where Palestrina held a musical position. He served as the choirmaster of the Cappella Giulia, the official choir of the basilica, from 1555 to 1560 and again from 1571 until his death in 1594. During his tenure, Palestrina composed numerous sacred works, including masses, motets, and hymns, which showcased his mastery of polyphonic composition and contributed significantly to the development of Renaissance music.