So, we got the dating of the zodiac GP of the exploits of Hercules in 1513 AD. This is the first quarter of the 16th century. JUST AT THIS TIME in Europe, thanks to the efforts of the humanists, “ancient” Greek literature becomes famous and comes into fashion. The first books of “antique” Greek authors are published. Not long before that, they were “happily found” by zealous humanists, allegedly in remote remote monasteries. At the same time, the originals of “priceless manuscripts” discovered by them, from which publications are made, soon disappear without a trace. They are never shown to the public. People do not even ask unnecessary questions – they are quite satisfied with the printed editions of the “classics”. 

Source known but NOT revealed to y’all :o)