I have a question. I remember watching a show about the Roman Empire, and in discussing its decline, it referred to an historian or innovator that during the Century of Crisis, dispatched a letter to the Roman emperor, imploring him to fund technological research and offered some plans on useful inventions.
Anyone know who that was? Or what those plans contained?

La Repubblica Ragusana - La quinta repubblica marittrima!
Italia triumphs again!
"When valour takes the field, short will the conflict be; Barbarian rage shall yield the palm to Italy. The vital spark remains, and Roman blood still warms Italians' veins."
- Petrarch