Do you know a website that could tell me facts about sacred music?

Answer 1

1. None can sense more deeply than you artists, ingenious creators of beauty that you are, something of the pathos with which God at the dawn of creation looked upon the work of his hands. A glimmer of that feeling has shone so often in your eyes when—like the artists of every age—captivated by the hidden power of sounds and words, colours and shapes, you have admired the work of your inspiration, sensing in it some echo of the mystery of creation with which God, the sole creator of all things, has wished in some way to associate you.
http://www.vatican.va/holy_father/john_paul_ii/letters/documents/hf_jp-ii_let_23041999_artists_en.html
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Answer 2

Here is a directory to dozens of websites about sacred music:
http://www.catholic-pages.com/dir/music.asp

With love in Christ.