Romorantin is a traditional French variety of white wine grape, that is a sibling of Chardonnay.
Legend has it that Romorantin was introduced to the Loire by King Francis I of France (1494–1547).
DNA fingerprinting has shown that it is one of many grapes to be the result of a cross between Gouais blanc (Heunisch) and Pinot fin teinturier, making it a sibling of famous varieties such as Chardonnay and Aligoté.
A Romorantin vineyard at Domaine Henry Marionnet claims to be the oldest in France.
It was planted in 1850 and somehow survived the phylloxera epidemic that devastated European vineyards in the late 19th century.