Question: Henry of Almain was the song of one of the wealthiest men in Europe who joined what?

Context paragraphs:
Rafael del Pino (businessman): Rafael del Pino y Moreno (and family) (born 10 November 1920 in Madrid, Spain; died 14 June 2008 in Madrid) was one of the wealthiest men in Europe.  He had a net worth of approximately 8.6 billion US dollars in 2007.  Del Pino founded the construction company Ferrovial in 1952, which became one of Spain's largest builders.  He stepped down as President of Ferrovial in 2000, passing on the position to his son, Rafael del Pino Calvo-Sotelo, who now heads the business.  He held an MBA from the MIT Sloan School of Management.  In 2000 he founded the Fundación Rafael del Pino with the mission of developing future leaders.

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").

Malbone Castle and Estate: Malbone is one of the oldest privately owned estates in Newport, Rhode Island.  Located on Malbone Road, the estate has a history dating to the mid-18th century, but the present main was built in 1848-49.  The estate once served as the country residence of Colonel Godfrey Malbone (1695–1768) of Virginia and Connecticut.  Colonel Malbone made his fortune as a shipping merchant and slave trader, becoming one of the wealthiest men in Newport during the 1740s through privateering and the triangle trade.  Malbone had built what Dr. Alexander Hamilton called one of the finest houses he had seen in the colonies, probably to a design by noted colonial architect Richard Munday.

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.

Rue Radziwill: The Rue Radziwill is a street in the 1st arrondissement of Paris.  It starts at 1 rue des Petits-Champs and ends in a dead end.  It was named after Polish Prince, politician and one of the wealthiest men in Europe Karol Stanisław Radziwiłł.

Sidney A. Umsted House: The Sidney A. Umsted House is a historic house at 404 Washington Street in Camden, Arkansas.  The two story brick house was built in 1923-24, and is one of the best local examples of Mediterranean Revival architecture in the city.  Sidney Umsted, for whom the house was built, became instantly wealthy with the discovery in 1922 of oil in nearby Smackover, and became one of Arkansas' wealthiest men.  The house is faced in beige brick, and features a green tile roof.

George Pitt-Rivers: George Henry Lane-Fox Pitt-Rivers (22 May 1890 – 17 June 1966), one of the wealthiest men in England in the interwar period, was an anthropologist and Eugenics expert, who embraced Antibolshevism and Antisemitism and was interned by the British government for two years during World War II.

Kveldúlfur: Kveldúlfur is an Icelandic trawler company that was established in 1912 by Thor Jensen.  Kveldúlfur was one of the largest fishing companies in Iceland until the Second World War, running 7 boats at peak.  It made Jensen one of the wealthiest men in Iceland.  The company operated from Reykjavík.  In 1929 it caught 23,791,000 kilos of fish.  After the war the company declined and eventually operated with just one trawler until closure in 1977.

Ardwold: Ardwold was the residence of Sir John Craig Eaton and Lady Eaton of Toronto, Ontario, Canada.  Sir John was the youngest son of Timothy Eaton, the founder of the T. Eaton Company Department Store, or Eaton's, and he inherited the business and became its president upon his father's death in 1907.  Sir John was one of the wealthiest men in Canada, and in 1909 he commissioned a home to be built on "The Hill", a name used to describe the neighborhood on the Davenport Hill in Toronto where many wealthy families built their homes.  Casa Loma, built by Henry Pellatt and the largest private house ever constructed in Canada, was near Ardwold, as were Spadina House, the mansion of James Austin, and Glenedyth, the estate of Samuel Nordheimer.

Simón Iturri Patiño: Simón Iturri Patiño (Santiváñez, 1 June 1862 – Buenos Aires, 20 April 1947) was a Bolivian industrialist who was among the world's wealthiest people at the time of his death.  With a fortune built from ownership of a majority of the tin industry in Bolivia, Patiño was nicknamed "The Andean Rockefeller".  During World War II, Patiño was believed to be one of the five wealthiest men in the world.

Supporting paragraphs: Henry of Almain Richard, 1st Earl of Cornwall
Answer: the Barons' Crusade