Richard of Cornwall, and his wife, Sanchia of Provence, are crowned King and Queen of the Germans at Aachen Cathedral.

Richard was an English prince who was King of the Romans from 1257 until his death in 1272. He was the second son of John, King of England, and Isabella, Countess of Angoulême. Richard was nominal Count of Poitou from 1225 to 1243, and he also held the title Earl of Cornwall from 1225. 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.

Sanchia of Provence was Queen of the Romans from 1257 until her death in 1261 as the wife of King Richard.

Aachen Cathedral is a Catholic church in Aachen, Germany and the cathedral of the Diocese of Aachen.

May 27 is the 147th day of the year in the Gregorian calendar; 218 days remain until the end of the year.