The current minimum height required for the Swiss Guard at the Vatican is 5'8 1/2" or 174 cm (Swiss Guard requirements).
Has that always been the case? I remember reading years ago that the minimum height requirement used to be about a foot (30 cm) more than that back when the Guard was formed. However, I have not been able to find anything on this one way or the other in basic information about the Swiss Guard.
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Support for the possibility of a much higher height requirement.
The basic argument is that adequate nutrition (and possibly living at altitude) may have provided conditions for height to be taller then.
Anecdotal evidence from World Atlas - people in the Dinaric Alps are the tallest in the world. While this is modern day and next door to Switzerland, I hope it is still of interest.
An NBA GM writes on NBA prospects in Africa. Average height in many areas is 198 cm (6'6").
THE PHYSIQUE OF THE ANCIENT HAWAIIANS "A skeleton from one of
the ancient burial caves measured six feet seven and three quarters inches (202.565 cm), and, as Bryan states, 'there is sufficient evidence to
establish the fact that men of even larger stature were by no
means unusual.'"