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Wikipedia ( i/ˌwɪkɨˈpiːdiə/ or i/ˌwɪkiˈpiːdiə/ WIK-i-PEE-dee-ə) is a free-access, free content Internet encyclopedia, supported and hosted by the non-profit Wikimedia Foundation. Those who can access the site can edit most of its articles. WikiArtpediA. Art cyclopedia. Wikipedia.it. Wikipedia. Wiki communities for everyone! Wikiversity. The-artists.org artists and art enciclopedia. OVO. Treccani- il portale del sapere.