Pianist Vladimir Horowitz has donated a collection of priceless recordings and other memorabilia from his long career to Yale University, school officials said.

The collection includes items ranging from the only recordings of Horowitz recitals at Carnegie Hall in the 1940s and 1950s to two autographed baseballs given to him at the only baseball game he has attended, officials said.No monetary value has been placed on the collection, but the acetate disc recordings of the Carnegie Hall recitals alone are considered priceless, said Harold E. Samuel, a music professor and librarian at Yale.

The collection is being moved to Yale's Jackson Music Library, where it will be used for research.