Liszt - A la Chapelle Sixtine (Allegri-Mozart), Valerie Tryon

Liszt - Vision a la Chapelle Sixtine

This description occurred in a letter.  Liszt is telling the Grand Duke about a new work of his the Vision a la Chapelle Sixtine and about the mystical experience that surrounded it

The vision in the Sistine chapel

Quoted in Franz Liszt The Virtuoso Years – Alan Walker
It seemed to me as if I saw Mozart and as if he looked back at time with gentle encouragement.  Allegri was standing by his side, basking in the fame which his Misere now enjoyed… then there emerged from the background, next to Michelangelo’s Judgement Day, slowly, unutterably great, another shadow.  Full of inspiration, I recognised it at once; for while he was still bound to this earth he had consecrated by brow with a kiss [reference to Beethoven].  He too had once sung his Misere and no human ear had ever heard such a deep and sublime sighing and sobbing.