Archaeologists at the Roman amphitheater in Salona, Croatia, have discovered a unique subterranean drainage network filled with fossilized botanical remains, predominantly rose and lily petals. The sophisticated system appears to have been designed to manage the aftermath of 'Floralia,' a Roman festival where thousands of flower petals were showered upon spectators and the arena floor.
This discovery provides rare insight into the immense logistical planning required for imperial festivals. The presence of specialized sluices suggests that the flowers were washed away using a gravity-fed water system after the spectacles, demonstrating that ancient event management was as concerned with cleanup and sanitation as it was with visual grandeur.