The houses of France are -

Merovigians 428-751 (25 kings)
Carolingians 768- 987 (13 kings)
     Robertians 888-923 (2 kings)
     Bosonids 923-936 (1 king)
House of Capet 987-1328 (15 kings) including Louis IX (St Louis)
House of Valois 1328-1498 (7 kings)
     House of Valois-Orle'ans 1498-1515 (1 king)
     House of Valois-Angouleme 1515-1589 (5 kings) including Francis I
House of Bourbon (1589-1830) including Henry IV and Louis XIV
House of Bonaparte (1804-1814,1815) Napoleon
Etc.
Most houses end because of no heir then it usually goes to another branch of the family.

Louis IX Born 1214. Became king 1226 but his mother was acting regeant. He became the acting king in 1226 to his death in 1270.
He died of dysentery in the eight crusade.
He brought Christ's crown of thorns and built the Sainte-Chapelle in Paris to house it.
Commanded the largest army and ruled the largest and wealthiest kingdom in Europe.
Started the Sorbonne (university).
He was considered the quintessential Christian prince.

Francis I. Born 1494. Became king in 1515 and died 1547.
During our travels we heard a lot about Francis the first. He traveled extensively throughout his kingdom. All chateaux were supposed to keep a room available in case the king dropped by. He made major improvements at Fountainebleau, brought Leonardo DiVinci to France, had Cherborg built as a hunting lodge (probably designed by Leonardo). He reigned at the time of Henry VIII of England and met with him several times. He was a major patron of the arts and standardized the French language. He was known as "Francis of the large nose" and the "Knight-King" because of his wars with Charles V the Holy Roman Emperor and king of Spain.