According to popular thinking, the Middle Ages was a period of ignorance, often represented by the supposition that people thought the earth was flat. (Ever hear the contemporary phrase “flat earth thinking”?)
It turns out that is a myth.
Check out this quote from a mediaeval theologian – Thomas Aquinas.
“the astronomer and the physicist both may prove the same conclusion: that the earth, for instance, is round: the astronomer by means of mathematics (i.e. abstracting from matter), but the physicist by means of matter itself.”
Summa Theologiae, p1.
Thomas Aquinas died in 1274.
Follow this link to find out more.