Some may feel it is an anachronism and "showing off", but at official ceremonies it is the custom for those entitled to wear medals to display them. Perhaps the downmarket equivalent is the T-shirts with university crests or football logos proudly displayed on the chests of weedy individuals - who have never attended that college or played for that team.
My father had three medals, which were not for any particular act of heroism, but for being a member of the armed forces at a given place and time. Incidentally, I would not dream of wearing any of them myself, as I was at home in my little cot at the time, not in France serving in the atmed forces.
Charles is not wearing any medals that he is not entitled to. His honours too are made up of awards for serving in the armed forces at a particular time or place, and also being a member of a high-ranking order or medals from other countries.
Some, like the coronation and jubilee awards, mark the fact that he was present for these events and ceremonies. Others have these medals too. The golden jubilee medal was awarded to all serving personnel of five years standing.
Starting with the bar of medals pinned to his breast, he has the Queen's Service Order (New Zealand), awarded in 1983; the Queen's Coronation medal, awarded in 1953 when he was four-years-old;
the Queen's Silver Jubilee medal, awarded in 1977;
the Queen's Golden Jubilee medal, awarded in 2002;
the Canadian forces decoration, awarded in 2002;
and the New Zealand commemorative medal, awarded in 1990.
Below those, the large silver star with the cross of St George in the centre shows he is a Knight of the Most Noble Order of the Garter. This was awarded in 1958 when he was nominated as the Prince of Wales.
The white enamelled Maltese Cross at his neck is the GCB, worn as Grand Master and Principal Knight Grand Cross of the Most Honourable Order of the Bath, a military version of the honour awarded in 1974.
And on the right is the red enamelled Order of Merit, civil version, awarded in 2002.
The Knights of the Garter, for example, include the sovereign, the successor and up to 25 other "companions" - former prime ministers and other figures with a solid record of service to the country.
It doesn't bother me whether he wears his medals in public or not.
These facts are from news.bbc.co.uk/1/hi/magazine/6147544.stm