How many people could recognize any but the 3-5 most repeatedly displayed historical figures from significantly before their own birth by sight or describe their appearance? I mean in Britain it might be a few more because they are so obsessed with their past monarchs but I doubt it would reach double digits.
I am not talking about school or documentaries or anything like that. I was more thinking there is a lot of media that portrays some of the past monarchs in always the same way, e.g. queen Victoria or king Henry VIII. It is not that the people know what they did or who they really were but their images are plastered in a lot of places in ways that others countries do not.
Most have things like statues or that mountain you mention, things that do not represent things like skin tone or hair colour accurately so unless someone differs ethnically a lot from the rest of the population you would never know those details from those kinds of portrayals of their appearance.