History of Burgundy in the context of Welfish Kingdom of Burgundy

The Duchy of Burgundy (/ˈbɜːrɡəndi/; Latin: Ducatus Burgundiae; French: Duché de Bourgogne) was a medieval and early modern feudal polity in north-western regions of historical Burgundy. It was a duchy, ruled by dukes of Burgundy. The Duchy belonged to the Kingdom of France, and was initially bordering the Kingdom of Burgundy to the east and south, thus being distinct from the neighboring Free County of Burgundy (modern region of Franche-Comté). The first duke of Burgundy (Latin: dux Burgundiae), attested in sources by that title, was Richard the Justiciar in 918.

In 1004, prince Henry of France, a son of king Robert II of France, inherited the Duchy, but later ceded it to his younger brother Robert in 1032. Robert became the ancestor of the ducal House of Burgundy, a cadet branch of the royal Capet dynasty, ruling over a territory that roughly conformed to the borders and territories of the modern region of Burgundy (Bourgogne). Upon the extinction of the Burgundian male line with the death of Duke Philip I in 1361, the duchy reverted to King John II of France and the royal House of Valois. The Burgundian duchy was absorbed in a larger territorial complex after 1363, when King John II ceded the duchy to his younger son Philip. With his marriage with Countess Margaret III of Flanders, he laid the foundation for a Burgundian State which expanded further north in the Low Countries collectively known as the Burgundian Netherlands. Upon further acquisitions of the County of Burgundy, Holland, and Luxemburg, the House of Valois-Burgundy came into possession of numerous French and imperial fiefs stretching from the western Alps to the North Sea, in some ways reminiscent of the Middle Frankish realm of Lotharingia.

The Kingdom of Burgundy (Latin: Regnum Burgundiae), also known as the Kingdom of Arles (Latin: Regnum Arleatense), was a realm established in 933 by the unification of Lower Burgundy with the Upper Burgundy. As an independent kingdom, it was ruled by monarchs from the Elder House of Welf until 1032, when it was incorporated into the Holy Roman Empire, becoming one of the empire's three constituent realms, together with the Kingdom of Germany and the Kingdom of Italy. By the 13th century it went through the process of feudal fragmentation, and since the 14th century the imperial rule over the kingdom became mainly nominal, weakening further during the 15th century.

Its territory stretched from the Mediterranean Sea in the south to the High Rhine in the north, and from the Western Alps in the east to the Rhône basin in the west, thus encompassing almost all of the historical Burgundian lands, and roughly corresponding to the present-day French regions of Provence-Alpes-Côte d'Azur, Rhône-Alpes and Franche-Comté, as well as the region of Romandy in western Switzerland.

Austrasia was a historical region and the northeastern realm within the core of the Frankish State during the Early Middle Ages, centering on the regions between Meuse, Moselle, Middle Rhine and the Main rivers. It included the original Frankish-ruled territories within what had been the northernmost part of Roman Gaul and parts of Roman Germania. It also stretched beyond the old Roman borders on the Rhine into Frankish areas which had never been formally under Roman rule. It came into being as a part of the Frankish Kingdom, founded by the Merovingian king Clovis I (r. 481–511), who expanded Frankish rule further to the southwest, into Gaul, whose northern regions came to be known as Neustria.

These two realms, or sub-kingdoms (Austrasia and Neustria), along with Aquitaine and Burgundy, were subsequently ruled by various rulers from the Merovingian dynasty, followed in the 8th and 9th centuries by their successors from the Carolingian dynasty, whose own powerbase was in Austrasia itself. The two Frankish dynasties did not always have a single ruling monarch over the whole Frankish realm, and already by 561, Austrasia was ruled as a separate kingdom within the Frankish realm by the Merovingian king Sigebert I (561–575). Kings often allowed different family members to rule sub-kingdoms, and these were sometimes in conflict with each other, despite the underlying continuity of the overall Frankish state.

List of kings of Burgundy includes all kings of Burgundy, as a historical realm that went through several political transformations, being established at first as the Ancient Kingdom of Burgundy (411-534), and later revived as the Welfish Kingdom of Burgundy (933-1032). It continued to exist as the Kingdom of Burgundy (Arles) within the Holy Roman Empire (since 1032).