Greek mosaic depicting the mythological creature (sea monster). From the greek city of Kaulonia, South Italy (Casa del Drago #HouseOfTheDragon no joke). ~3rd c. BCE, Archeological Museum of Calabria. Update 4.2.0. Big Blue Bubble The 1991 Monsters of Rock festival in Moscow is remembered as one of the largest concerts in history, drawing a massive crowd of 1.6 million attendees. It became a historic moment for Metallica, Monarch: Legacy of Monsters Episode 5 Recap: "The Way Out"