As neither Robert nor Edward had a strong constitution, Yolande obtained a papal dispensation from Clement VI to allow them to eat meat during periods of abstinence.

When his brother Edward died, Robert was still only seven years old and political problems associated with his mother's continued position as regent had arisen.

Joan of Bar, Robert's grandaunt, made known to the king that she was ready to replace Yolande and assume the regency.

[2] Subsequent emperors recognised Robert's ducal title and his state's right to a vote in the Imperial Diet.

In 1364 he married Marie of Valois, the daughter of king John II of France and Bonne of Luxembourg.