Prince Charles has received an award for his watercolors at the Florence International Biennale Exhibition of Contemporary Art.

The heir to the British throne was honored for enriching the world's most comprehensive exhibition of contemporary art by contributing 20 lithographs of watercolors depicting his country estates.

He is one of only three people to have received the City of Florence prize, which recognizes those who have made a special contribution to the "life and spirit" of the Biennale, which opened at Florence's Fortezzo da Basso on Friday.

"By graciously contributing these lithographs, he has shown his personal concern for contemporary artists, who of course, need all the recognition they can get," Professor John Spike, exhibition director and a member of the judging panel of international art critics, said Monday.

Charles' lithographs, which he sells for charity, are exhibited in their own area near the entrance to the show, which lasts until Dec. 16.