Now I'm not an expert on medieval guards, but aren't swords and armour, let alone iron extremely expensive in a pre-industrial age?
Also, imagining having to carry a sword around all day without a sheathe/sling.
Wouldn't a pike/halberd make more logical sense? At least if you have to stand around all day, you'd have something to lean on.
When I looked at the clothing, I also noticed it's red. I'm fairly certain that red used to be one of the most expensive colours to produce back in the 1400s...
The guy in the image, doesn't strike me as your every day medieval guard. The captain of the guard at most.
More of a realistic observation, but o well.
I hope you'll find my feedback (nitpicking) useful