Sacred Destinations Destinations Italy Ravenna San Giovanni Evangelista San Giovanni Evangelista Photos 16624 × share full URL share short URL embed link code photo 27 of 36 Previous | Next Mosaic Mermaid Fragment of Romanesque mosaic floor (1213 AD) in San Giovanni Evangelista, Ravenna, depicting a blonde mermaid (or siren) with a thorny double tail. Credit: Holly Hayes