The Book of Hours prayer book - a manuscript bound in gold and encrusted with emerald, ruby and turquoise gemstones - belonged to France’s King Francis I, who gifted the treasure to his 10-year-old niece during the 16th century.
Deemed by experts to be a masterpiece, the book now belongs to a private collector in Britain.
The Louvre says it needs 10 million euros to acquire the piece. Luxury group LVMH has pledged half of the money. The museum hopes to raise the rest through a crowdfunding campaign and donations from companies.
Louvre President Jean-Luc Martinez says the Book of Hours would become one of the Louvre’s iconic pieces alongside the Mona Lisa.