The Nile Mosaic of Palestrina is tile artwork considered to be a masterpiece of antiquity. It seems to depict everyday life in a town east of Rome in central Italy. Features detail depictions of Ptolemaic Greeks, black Ethiopians in hunting scenes, and various animals including animals thought as those that went extinct 10,000 years ago during the ice age. Yet each animal is not only depicted with amazing accuracy, many are named. To the right, stunningly, men are depicted hunting a dinosaur-like creature in a body of water. This Mosaic is one of the earliest Roman depiction of Nilotic scenes although several more were uncovered at Pompeii. How could these artists depict all these extinct animals before paleontology? The obvious answer is they had witnessed these animals and they were common to their experiences.
https://en.wikipedia.org/wiki/Nile_mosaic_of_Palestrina
The Nile Mosaic of Palestrina