It appears that some people knew the Earth was spherical as early as 6 BC. Specifically in Greek culture. However, the Bible describes the Earth as being surrou

It appears that some people knew the Earth was spherical as early as 6 BC. Specifically in Greek culture. However, the Bible describes the Earth as being surrounded by a Firmament. This is used in the flat-Earth model to describe a stone-like covering which has literal holes opening to let light through. This is strange considering all of the reworks that the bible went through even up until the 400's. It seems like if it were something widely accepted by scholars or even laymen that it would have been something to correct. You can see regional differences in the bible as it was being written and spread across the middle East, but the knowledge of the spherical Earth must not have spread quickly enough to this area in which copies of the bible were being made.