Prince Charles looked right at home, inspecting a haunch of wild boar and sampling luxury olive oils.
A farmer himself, and an advocate of organic food, he took special interest in the produce being sold at many of the stalls.
But, it looked rather more incongruous when Charles started sipping on a cup of "builder's tea".
The Prince normally has his tea without milk and with a spoonful of honey, but he ordered one with two sugars and as strong as you can make it from cafe-owner Maria Moruzzi.
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Donald Trump is to visit the UK on July 13 and hold bilateral talks with Theresa May, Britain's ambassador to the US has said.
The Football Association has announced it has received an offer to buy Wembley Stadium.
The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.