John Rudolph was shocked to learn that Marathon High School's state-of-the-art auditorium was without a house piano -- so he decided to donate one.</p><p>But this isn't just any old piano. It's an antique 7-foot Lester concert grand piano that at one time graced the stage at the world-renowned Philadelphia Academy of Music.</p><p>Rudolph, a professional performer and Key Colony Beach resident, was using the 70-year-old piano as a backup and said the school would be able to put it to much better use. He bought it at an estate sale in Philadelphia, Pa., from where it was shipped last week.</p><p>"When I found out Harry didn't have a piano at the high school, I thought, 'Kids need instruments,'" Rudolph said, referring to Principal Harry Russell. "I was going to have to rent [a piano] but I just kept thinking, 'Wow, there's no piano in the" high school.</p><p>Rudolph said he was nervous to move the piano, but that it's well made and handled the transport well. It even has ivory keys -- a feature manufacturers stopped using long ago.</p><p>Now the piano is getting its first school use.</p><p>Rudolph and another Keys resident and musician, Charles Lindberg, are putting on a show titled "A Night of Music" 7:30 p.m. Oct. 24. Lindberg composed original music for the show, Rudolph will sing and Marathon dancers Theo and Ganine Derleth will also perform.</p><p>Rudolph said the show came about after friends asked him to "bring the community into the facility."</p><p>Russell said he envisions the theater as a "Tennessee Williams of the Middle Keys," referring to the Tennessee Williams Theatre at Florida Keys Community College.</p><p>"This is huge from a perspective that the community fought to have this built," Russell said, referring to the new $47 million school on Sombrero Beach Road.</p><p>Tickets to "A Night of Music" are $20 each and available at www.keystix.com or by calling 295-7676. A portion of proceeds from the show will be donated to local charities.