Among the great contemporary composers, Xenakis was the most influenced by mathematics. Some said his computers were the real authors of the musical pieces. That’s wrong: Xenakis art is in his choice of themes, in how computers are programed.
The last nail in the coffin of classical traditions, was hit by Spiritism, nowadays also known as Kardecism. To this religion, there’s no devil, only human beings doing petty malignant roles, that will they will become tired of someday.
The famous Schubert’s Ave Maria wasn’t created by Franz Schubert. The original song is also a prayer to the Virgin Mary, but this version is an adaptation of the words of the Hail Mary prayer to the Schubert’s melody.