Henry of Blois unsuccessful. However, on 1 March 1139, during the reign of his brother Stephen, Henry obtained a commission as papal legate, which gave him higher rank than Theobald of Bec, Archbishop of Canterbury, making him the most powerful figure in the English Church during the troubled times of the so-called "Anarchy". Thus, when his brother was unavailable, Henry of Blois was the most powerful, and possibly the wealthiest, man in England. Stephen of Blois was crowned King of England in 1135, but the relations between the two brothers were not always peaceful. After the Battle of Lincoln in 1141, Henry found
Counts of Blois England. Charles de Blois, son of Guy I, Count of Blois, married Joan of Penthievre, the heiress of John III, Duke of Brittany; together, they became principal protagonists in the War of the Breton Succession. Upon the death of his only son, Guy II, Count of Blois sold the county to Louis I, Duke of Orléans and the county passed to the French royal family. Blois was important during the Hundred Years' War; Joan of Arc based herself there. The extent of the county varied over time. The northern portion, bordering on Normandy, was sometimes alienated as the County of