(left) Royal banner of the Kingdom of Navarre; (right) Coat of Arms of the Kingdom of Navarre, used in France's until 1790.
History
The original Kingdom of Navarre that spanned land on both sides of the Pyrenees mountains, was traditionally regarded as having originated in 824 AD with the coronation of Íñigo Arista as ruler of the Kingdom of Pamplona, a vassal to the Islamic Emirate of Cordoba and also the predecessor state to the Kingdom of Navarre, which is considered to be a Spanish state in the Numista country list. This Kingdom of Navarre existed for over five centuries following the decline of Cordoba, during which it's territory was diminished by Castilian and French conquest of it's outlying territories over the years, something the relatively powerless kingdom could do little to resist; during this time it was also ruled periodically by the kings of Aragon (1054-1134) and by those of France (1285-1328), the latter of which gave the Navarrese monarchy a link to the French monarchy.
(above) The whole Kingdom of Navarre in 1477, before the Spanish invasion and annexation of Navarre south of the Pyrenees.
In 1512, however, Spain (Castile and Aragon) invaded the Kingdom of Navarre as part of the War of the League of Cambrai, after Ferdinand of Aragon had it's ruler excommunicated by the Pope, soundly defeating the tiny kingdom and incorporating it's lands south of the Pyrenees into the Crown of Castile. By 1524 that region had been pacified and incorporated into Spain, but the northernmost merindad (province) of Navarre, Ultrapuertos, remained independent and still in Navarrese hands. This rump state of the Kingdom of Navarre would be referred to as "Lower Navarre"; and it's king from 1572 onwards, Henri III, supported the Protestant Huguenots in the French Wars of Religion. It was this support that made the Catholic Valois dynasty reluctant to recognise him as a legitimate successor; nonetheless he became King Henri IV of France in 1589, putting Navarre in a personal union with France and beginning the Bourbon-Navarre dynasty that would rule until the French Revolution.
(above) Coat of Arms of the French monarchy 1589-1789, featuring the arms of Navarre beside those of France, symbolising the monarchy's ties to Navarre.
Henri IV would rule France until his assassination in 1610, converting to Catholicism ("Paris is worth a Mass"); his successors until the Revolution would continue to take on the title of "Roi de France et (de) Navarre" (King of France and Navarre), for the symbolic separate status of Navarre within France, despite the Kingdom of Navarre itself being formally merged with the Kingdom of France in 1620-24. Following a Franco-Spanish war, the 1659 Treaty of the Pyrenees was signed, whereupon the current border between the two countries was formalised, and the Franco-Navarrese Bourbon monarchy of France gave up their claims to the parts of Navarre annexed by Spain back in 1524. This arrangement, where Navarre was part of, but separate from France lasted until the French Revolution in 1789, whereupon Navarre was integrated into France proper by the new French Republic, permanently.
Coinage
The Kingdom of Navarre before it's invasion by Spain, used coins denominated similarly to those used in the Kingdoms of Castile and Aragon, found in the Numista catalogue here; however after said invasion, from 1516 coins were made to the standards of the French livre, which are the coins listed in the target of this WCC, found here. As such, the base denominations of the Navarrese livre were the livre (physically manifested as a silver coin nicknamed the franc), worth 20 sous/sols, each of which was worth 12 deniers.
(above) Reverse of a Navarrese Teston issued in 1577 under King Henri III of Navarre, note the fleur-de-lys of the Capetian dynasty of France, as well as the cows of Béarn on his coat of arms. He was also Henri II of Béarn, and Henri IV of France (from 1589); which can be confusing, since some Navarrese coins of Henri III use his Béarn title of Henri II.
Unlike as seen in other French feudal issuers, however, by the time Navarre began using the livre, the base denomination of Charlemagne's time, the denier, had become too worthless due to accumulated inflation over the centuries; so the lowest denomination minted for Navarre was the Liard, worth 3 Deniers; Numista also lists various examples of Testons, a denomination worth half a livre,, or 10 Sols (120 deniers). The last denomination listed on Numista for this issuer, the Franc, is a colloquial nickname for coins worth 1 livre; this coin had been a gold coin in the 14th century, but by the 16th inflation had reduced it to a large silver one.
https://en.numista.com/catalogue/navarra_kingdom-1.html
