Mold Castle was erected under instructions from the Earl also known by what name?
Hugh d'Avranches, Earl of Chester Hugh d'Avranches (  1047  – 27 July 1101), also known as Hugh the Fat (French: "Hugues le Gros" ) or Hugh the Wolf (Latin: "Hugo Lupus" ), was the second Norman earl of Chester (2nd creation) and one of the great magnates of early Norman England.
Michael I of Wallachia Michael I (Romanian: "Mihail I" ) was voivode (or prince) of Wallachia from 1417 to 1420. He was the only legitimate son of Mircea I of Wallachia, who made him his co-ruler. Styled as prince from 1415, Michael became sole ruler after his father died in early 1418. His support for a Hungarian campaign against the Ottoman Empire caused the Ottoman Sultan, Mehmed I, to invade Wallachia, forcing him to agree to pay tribute. After Michael failed to respect the treaty, the Ottomans gave assistance to his rival, Dan, who crossed into Wallachia in 1420. Dan and his Ottoman allies defeated the Wallachian army, and Michael was killed on the battlefield.