The I.M. Pei–designed Rock & Roll Hall of Fame & Museum, with its soaring glass pyramid atrium, 162-foot tower, and haphazardly attached circular white column, sits at the edge of Lake Erie looking like the hard-won beachhead of some futuristic society risen from the depths. A crown jewel of Cleveland’s cultural scene, it entertains a half-million visitors a year who come to peruse the five levels and 55,000 square feet of exhibit space that house the instruments, personal effects, costumes, stage props, lyric sheets, recording gear, and still imagery that constitute an intricate, embroidered backdrop to countless American teenage lives.