I certainly am no expert on chairs, there is one on this forum, jacon, but he doesn't seem to be around, but ... I would hazard a guess that they were not 16th century. I've never seen chairs of that period padded, but I could be wrong. The style also does not look quite right. Without seeing close-ups of the joints and underside the earliest that I would put on them would be late 19th century. That was a period of Gothic and Renaissance revival. Nevertheless, nice looking chairs.