The Pierpont Morgan Library is showing what it says is the largest exhibition of Mozart's autograph scores, letters and early printed editions of his music ever presented in this country, to commemorate the bicentennial of his death.

The exhibition, "Mozart: Prodigy of Nature," May 8-Aug. 4, puts on view materials from the library's own holdings and those of the British Library, London. The two institutions are described as "two of the world's preeminent repositories of Mozart manuscripts in the world." Following its New York showing, the exhibition will travel to the London library.The 50 or so manuscripts in the exhibition span Mozart's creative life, from keyboard pieces composed at the age of 5 to his last works, including four symphonies. Other autograph materials include his earliest known letters, his marriage contract and his last letter to his father.

In conjunction with the exhibition, the museum has produced a 30-minute audio-visual program narrated by Frederica von Stade, to be shown daily. There will also be related lectures, a companion volume and concerts to be broadcast live.

- Around the same time, adding to the chorus of celebration for the Mozart bicentennial, another exhibition, "Mozart's World: The Images of his Times," will be on show up at Lincoln Center for the Performing Arts.

This is a collection of more than 100 prints, first editions, manuscripts and period costumes, at the New York Public Library for the Performing Arts May 17-Aug. 31. The objects on display are from institutions across the country, as well as from the library's own collections. The exhibition is partially funded by the Mozart Bicentennial at Lincoln Center, and is part of its 19-month celebration.