Situated on the eastern slope of what was called at the turn of the century, Mount Theodore Thomas, on a rough, wooded tract containing outcropping crests of foundation rock, stands Felsengarten, the former home of Theodore Thomas, the great American conductor and educator, and his wife Rose Fay, the founder of the National Federation of Music Clubs. Felsengarten, meaning Rock Garden, was so named because of the rock formations and boulders and the brilliant blossoms of many wild flowers which flourished on the mountain side. - NRHP, 18 July 1973