ROME -- On a recent weeknight, long after the swarms of tourists had left Rome's Colosseum, a small group of people walked around outside the darkened amphitheater, pausing every so often to take in a new aspect of its history, art or architecture with every sense but sight.

ROME -- On a recent weeknight, long after the swarms of tourists had left Rome's Colosseum, a small group of people walked around outside the darkened amphitheater, pausing every so often to take in a new aspect of its history, art or architecture with every sense but sight.