In the 6th century, a sailor threw a bottle at a whale off the coast of Constantinople.
In response,the whale spent the next 50 years sinking so many ships off the Byzantine coast it was named Porphyrios after the giant who attacked Olympus & the Emperor unsuccessfully dedicated his reign against it
Can you imagine being that sailor? For the rest of your life: 'Hey, aren't you the guy who-', 'Hey, where are you going with that bottle?', 'But have you tried apologizing to the whale?', 'Are you really telling me you couldn't find a bin that day?'
It would never stop.
Emperor: "Aye, aye! It was that accursed purple whale that razeed me; made a poor pegging lubber of me for ever and a day! … and I'll chase him round Good Hope, and round the Horn … this is what ye have shipped for, men! to chase that purple whale … till he spouts black blood and rolls fin out."
Porphyrios wanted to take out the supply of sand for glass. A+ for style, F for execution, alas, for the anti-glass component of his plan. Respect to Porphyrios.
In the end the only thing that could take out Porphyrios was his own ambition, it died after it beached itself. No doubt while heading for Rome itself to declare a new regime.