Diligentia
Diligentia is a learned society founded in The Hague in 1793. All reigning monarchs of The Netherlands since King William I have been patrons of Diligentia, and many members of the Royal Family have been honorary members.
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Wikipedia
Diligentia is a learned society founded in The Hague in 1793. All reigning monarchs of The Netherlands since King William I have been patrons of Diligentia, and many members of the Royal Family have been honorary members.