| King of Navarre |
Count of Champagne
|Died||22 July 1274|
|Spouse||Blanche of Artois|
|Issue||Theobald of Navarre|
Joan I of Navarre
|House||House of Blois|
|Father||Theobald I of Navarre|
|Mother||Margaret of Bourbon|
Henry the Fat (Basque: Henrike I.a, Gizena, French: Henri le Gros, Spanish: Enrique el Gordo) (c. 1244 – 22 July 1274) was King of Navarre (as Henry I) and Count of Champagne and Brie (as Henry III) from 1270 until his death.
Henry was the youngest son of Theobald I of Navarre and Margaret of Bourbon.  During the reign of his childless older brother Theobald II he held the regency during many of Theobald's numerous absences. In 1269, Henry married Blanche of Artois, daughter of the then-reigning King Louis IX of France's brother Count Robert I of Artois.  He was thus in the "Angevin" circle in international politics.
Recognized as heir presumptive during his brother's reign, Henry succeeded to the thrones of the Kingdom of Navarre and County of Champagne upon Theobald II's death in December 1270. Henry I's proclamation at Pamplona, however, did not take place till the following year, 1 March 1271,  and his coronation was delayed until May 1273. His first act was the swear to uphold the Fueros of Navarre and then go to perform homage to Philip III of France for Champagne.
Henry came to the throne at the height of an economic boom in Navarre that was not happening elsewhere in Iberia at as great a rate. But by the Treaty of Paris (1259), the English had been ceded rights in Gascony that effectively cut off Navarrese access to the ocean (since France, Navarre's ally, was at odds with England). Henry allowed the Pamplonese burg of Navarrería to disentangle itself from the union of San Cernin and San Nicolás, effected in 1266. He also granted privileges to the towns of Estella, Los Arcos, and Viana, fostering urban growth. His relations with the nobility were, on the whole, friendly, though he was prepared to maintain the peace of his realm at nearly any cost.
Henry initially sought to recover territory lost to Castile by assisting the revolt of King Alfonso X of Castile's brother Philip in 1270. He eventually declined, preferring to establish an alliance with Castile through the marriage of his son Theobald to Alfonso X's daughter Violant in September 1272.  This failed with the death of the young Theobald after he fell from a battlement at the castle of Estella in 1273. 
Henry did not long outlive his son. He was suffocated, according to the generally received accounts, by his own fat.  His only legitimate child, a one-year-old daughter named Joan, succeeded him under the regency of her mother Blanche. Joan's 1284 marriage to Philip the Fair, the future King of France,  in the same year united the crown of Navarre to that of France and saw Champagne devolve to the French royal domain.
In the Divine Comedy , Dante Alighieri, a younger contemporary, sees Henry's spirit outside the gates of Purgatory, where he is grouped with a number of other European monarchs of the 13th century. Henry is not named directly, but is referred to as "the kindly-faced" and "the father-in-law of the Plague of France". 
Philip III, called the Bold, was King of France from 1270 until his death in 1285. His father, Louis IX, died in Tunis during the Eighth Crusade. Philip, who was accompanying him, returned to France and was anointed king at Reims in 1271.
Charles III, called the Noble, was King of Navarre from 1387 to his death and Count of Évreux from 1387 to 1404, when he exchanged it for the title Duke of Nemours. He spent his reign improving the infrastructure of his kingdom, restoring Navarre's pride after the dismal reign of his father, Charles the Bad, and mending strained relations with France.
The count of Champagne was the ruler of the County of Champagne from 950 to 1316. Champagne evolved from the County of Troyes in the late eleventh century and Hugh I was the first to officially use the title count of Champagne.
Theobald III was Count of Champagne from 1197 to his death. He was designated heir by his older brother Henry II when the latter went to the Holy Land on the Third Crusade, and succeeded him upon his death. He cooperated closely with his uncle and suzerain King Philip II of France. He died young, and was succeeded by a posthumous son, Theobald IV, while his widow, Blanche of Navarre, ruled as regent.
Theobald I, also called the Trobadour and the Posthumous, was Count of Champagne from birth and King of Navarre from 1234. He initiated the Barons' Crusade, was famous as a trouvère, and was the first Frenchman to rule Navarre.
Joan I was Queen of Navarre and Countess of Champagne from 1274 until 1305; she was also Queen of France by marriage to King Philip IV. She founded the College of Navarre in Paris in 1305.
Theobald II was King of Navarre and also, as Theobald V, Count of Champagne and Brie, from 1253 until his death. He was the son and successor of Theobald I and the second Navarrese monarch of the House of Blois. After he died childless, the throne of Navarre passed to his younger brother, Henry I.
Frederick III was the Duke of Lorraine from 1251 to his death. He was the only son and successor of Matthias II and Catherine of Limburg.
Joan II was Queen of Navarre from 1328 until her death. She was the only surviving child of Louis X of France, King of France and Navarre, and Margaret of Burgundy. Joan's paternity was dubious because her mother was involved in a scandal, but Louis X declared her his legitimate daughter before he died in 1316. However, the French lords were opposed to the idea of a female monarch and elected Louis X's brother, Philip V, king. The Navarrese noblemen also paid homage to Philip. Joan's maternal grandmother, Agnes of France, and uncle, Odo IV of Burgundy, made attempts to secure the counties of Champagne and Brie to Joan, but the French royal troops defeated her supporters. After Philip V married his daughter to Odo and granted him two counties as her dowry, Odo renounced Joan's claim to Champagne and Brie in exchange for a compensation in March 1318. Joan married Philip of Évreux, who was also a member of the French royal family.
Guy of Dampierre was the Count of Flanders (1251–1305) and Marquis of Namur (1268–1297). He was a prisoner of the French when his Flemings defeated the latter at the Battle of the Golden Spurs in 1302.
Blanche of Artois was Queen of Navarre and Countess of Champagne and Brie during her marriage to Henry I of Navarre. After his death she became regent in the name of their infant daughter, Joan I. She passed on the regency of Navarre to Philip III of France, her cousin and her daughter's prospective father-in-law, but retained the administration of Champagne. She later shared the government of Champagne with her second husband, Edmund, until her daughter reached the age of majority.
Philip III, called the Noble or the Wise, was King of Navarre from 1328 until his death. He was born a minor member of the French royal family but gained prominence when the Capetian main line went extinct, as he and his wife and cousin, Joan II of Navarre, acquired the Iberian kingdom and a number of French fiefs.
Blanche of Navarre was Countess of Champagne by marriage to Theobald III, Count of Champagne, and regent of Champagne during the minority of her son Theobald I of Navarre between 1201 and 1222.
William VII, called the Great Marquis, was the twelfth Marquis of Montferrat from 1253 to his death. He was also the titular King of Thessalonica.
The War of the Succession of Champagne was a war from 1216 to 1222 between the nobles of the Champagne region of France, occurring within that region and also spilling over into neighboring duchies. The war lasted two years and de facto ended in 1218, but did not officially end until Theobald IV reached the age of majority in 1222, at which point his rivals abandoned their claims.
Érard de Brienne was a French nobleman. He was lord of Ramerupt and of Venizy, and also a pretender to the county of Champagne as an instigator of the Champagne War of Succession. He was a son of André of Brienne and of Alix of Vénizy.
Isabella of France was Queen of Navarre by marriage to Theobald II of Navarre. a daughter of Louis IX of France and Margaret of Provence.
Margaret of Bourbon was Queen of Navarre and Countess of Champagne from 1234 until 1253 as the third wife of Theobald I of Navarre. After her husband's death, she ruled both the kingdom and the county as regent for three years in the name of their son, Theobald II of Navarre.
Philippa of Champagne was the third daughter of Queen Isabella I of Jerusalem and Count Henry II of Champagne. She was the wife of Erard de Brienne-Ramerupt, who encouraged her in 1216 to claim the county of Champagne which belonged to her cousin Theobald IV, who was still a minor. This provoked the conflict with Theobald's mother, the Regent, Blanche of Navarre, which erupted into open warfare, and came to be known as the Champagne War of Succession. Blanche's son Theobald, who had the support of King Philip II of France, Frederick II, Holy Roman Emperor, and Eudes III of Burgundy, eventually emerged the victor. Philippa renounced her claim in April 1222, but Theobald was constrained to pay Erard and Philippa a large monetary settlement for his rights to the county.
The Treaty of Orléans was a marriage treaty signed in 1275, that led to a short-lived personal union between the kingdoms of Navarre and France. It was signed by Philip III of France and his cousin Blanche of Artois, mother and regent to the two-year-old Joan I of Navarre. The original intent of the treaty was to not create a personal union, however, but to enable Philip to administer Navarre in Joan's name. Joan was also to marry either Philip's firstborn and heir apparent, Louis, or his second son, Philip. Pope Gregory X explicitly stated that he preferred a match with the younger son, as he probably wished to avoid merging Navarre with France. Louis died in 1276, however, leaving Philip as the only choice per the terms of the treaty.