Henry of Almain was the song of one of the wealthiest men in Europe who joined what?
Richard, 1st Earl of Cornwall Richard (5 January 1209 – 2 April 1272), second son of John, King of England, was the nominal Count of Poitou (1225-1243), Earl of Cornwall (from 1225) and King of Germany (from 1257). He was one of the wealthiest men in Europe and joined the Barons' Crusade, where he achieved success as a negotiator for the release of prisoners and assisted with the building of the citadel in Ascalon.
Union of Aragon The Union of Aragon (Castilian: Unión de Aragón) or "Union of the Nobles" was an anti-royalist movement among the nobility and the townsmen of the lands of the Crown of Aragon during the last quarter of the thirteenth century. Its efforts culminated in a series of articles confirming the privileges of the aristocracy and the cities and proscribing the power of the monarchy known as the "Magna Carta of Aragon".