Robert IV of Artois (1356 – 20 July 1387), son of John of Artois, Count of Eu and Isabeau of Melun, was

Count of Eu Count (feminine: countess) is a historical title of nobility in certain European countries, varying in relative status, generally of middling rank in the hierarchy of nobility.L. G. Pine, Pine, L. G. ''Titles: How the King Became His Majesty'' ...

from April to July 1387. About 1376, he married Joanna of Durazzo, daughter of Charles, Duke of Durazzo. Robert IV inherited the County of Eu on 6 April 1387, along with Saint-Valery and Ault, however, in Naples at the time, he never learned of his father's death. He and his wife were poisoned whilst staying at

Castel dell'Ovo Castel dell'Ovo ("Egg Castle") is a seafront castle in Naples, located on the former island of Megaride, now a peninsula, on the Gulf of Naples in Italy. The castle's name comes from a legend about the Roman poet Virgil, who had a reputation in ...

on 20 July 1387, on the orders of Joanna's own sister

Margaret Margaret is a female first name, derived via French () and Latin () from grc, μαργαρίτης () meaning "pearl". The Greek is borrowed from Persian. Margaret has been an English name since the 11th century, and remained popular through ...

, Queen Regent of Naples. Robert and Joanna were buried in the church of San Lorenzo Maggiore in Naples. The marriage of Robert and Joanna had remained childless. Robert was succeeded in Eu by his younger brother Philip of Artois, Count of Eu.

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* 1356 births 1387 deaths Counts of Eu Deaths by poisoning House of Artois French people murdered abroad People murdered in Italy {{france-noble-stub