Yes but when Toady said 1400s it is more of a rule of thumb then absolute. It between history and style: So while Toady looked at pre-1400s medicine for where to put it he has also said no to such ancient devices as batteries
Toady said he would support Gunpowder through mods but it won't be in Vanilla if I remember correctly.
Ironically Brainsurgery has been around since Ancient times. (Egyptians practiced it, Incans, Mayans, and to a lesser degree Chineese as well.)
On another side note ot an earlier post on scale mail. Scale has been around longer than mail. Ancient Hittites, Persians, and Philistiens all used it heavily. Heck, Even Japaneese soldiers used the concept.
Ring Mail as invented (I believe don't qupte me please) as a way to make armor out of otherwise useless pieves of mail. take rings and mail sections and sew them onto leather backing with the rings overlapping.
Also interestingly enough. It was not durring the 16-1700's that man invented the steam engine. It was invented in Egypt around the time of the fall of the Roman Empire.
Another thing, people keep sayingthat batteries cannot be in because they are a "Modern" Invention, Yet Ancient Babylonians made batteries out of Wine Jugs and used them in electroplating items with gold and silver.
Myans were a very remarkable people as well, For starters, not only did they come up with the most accurate measurment of the earth (until we mapped the earth with lasers from orbit) but they accurately predicted alignments of celestial bodies far into the future. They also invented Airconditioning. All of thier temples are laid out so that drring the hot months the entire building is regulated down to 65-70 degrees and durring the cool onths they are actually warmed up to the same threshold.
Ancinet cultures and people were very inventive and most people don't give them enough credit.