Henry of Almain was the song of one of the wealthiest men in Europe who joined what?
Henry of Almain Henry of Almain (Anglo-Norman French: "Henri d'Almayne") (2 November 1235 – 13 March 1271) was the son of Richard, 1st Earl of Cornwall and his first wife Isabel Marshal. His surname is derived from a vowel shift in pronunciation of "d'Allemagne" (English: of Germany), so called by the elites of England because of his father's status as the elected German King of the Romans (the "King of Almayne").
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".