
Map of the main part of the Balaton principality (parts of the Dudleb County, of the Ptuj County, of the whole former Principality of Etgar, as well as territories in the east of the Danube and in the south of the Drava are not shown on this map)
The 'Balaton Principality' (also called 'Pannonia', 'Lower Pannonia', 'Pannonian Principality', 'Transdanubian Principality' or 'Slavic Pannonian State',
839/
840-
876) was a Slavic principality (duchy) located in the western part of the
Pannonian plain, between the rivers
Danube to its east (temporary also included territory in the east of the Danube),
Drava to the south (temporary also included territory in the south of the Drava),
Graz to the west, and
Kőszeg or
Klosterneuburg to the north (except for the territory between the
Rába river, the
Balaton and modern
Budapest).
Name
In Slovak, the principality is known as ''Blatenské kniežatstvo'', in Serbian and Croatian as ''Panonsko Kneževstvo'' (Панонско Кнежевство), in Hungarian as ''Balatoni Fejedelemség'', and in Slovenian as ''Spódnja Panónija''.
All the above names are modern names, because no name has been preserved from that time. The name "Balaton" is the
Hungarian form of the original Slavic name - ''Blatno'' ("muddy") or a similar form - for that lake. Frankish sources usually called the territory either simply "Pannonia" or identified it by the name of the then ruler of the principality.
History
The principality was one of the several Slavic states and groups connecting the areas inhabited by
Slavs before they were divided into the northern and the southern Slavs by the conquests of the
Franks, the arrival of the
Magyars in Pannonia, and later by the expansion of the
Romanians.
The Slavic people of that time were weakly differentiated, speaking closely related dialects of the same common language. The inhabitants of the Balaton Principality were most probably closely related to each of neighboring Slavic people:
Great Moravians (
Slovaks) to the north,
Karantanians (
Slovenes) to the west, Pannonian
Croats to the south, and
Serbs to the south-east, providing the bridge between those Slavic states and tribal unions.
The Slavic inhabitation of
Pannonia started in the late
5th century after the fall of the
Hunnic tribal union. In the late
6th century the Slavs in the territory became subjects of the
Avar tribal union (
Avar Khaganate). Attacks of
Franks (led by
Charles the Great),
Slavs from present-day Moravia and Slovakia, and
Bulgars (led by khan
Krum) and internal feuds defeated the Avars in the late
8th century and the liberated Slavs of Pannonia started organizing semi-independent political units.
In the course of the creation of
Great Moravia in
833 to the north of the Danube,
Pribina (Priwina), until then the Prince of the
Principality of Nitra (
Slovakia), was expelled from his country by
Mojmír I of the Moravian principality. In
839 or
840, he founded the Balaton Principality (whose Slavic name means "Principality (Duchy) of the Muddy lake (or river)"). Its capital was the
Blatnograd (Blatnohrad, later called Mosapurc), a fortified city built at the
Zala river (Zala in Hungarian, in Slavic languages "Blatna" or similar forms meaning Muddy river) between the small and large
Balaton lakes (Balaton in Hungarian, in Slavic languages ''Blatno'' / ''Blatenské jazero'' or similar forms meaning Muddy lake).

Statue of Kocel
During the reign of Pribina's son, prince
Kocel (Gozil, Koceľ, Kocelj, 861-876), in the summer of 867, it provided short-term hospitality to brothers
Cyril and
Methodius on their way from
Great Moravia to the pope in Rome to justify the use of the
Slavonic language as a liturgical language. They and their disciples turned Blatnograd into one of the centers that spread the knowledge of the new Slavonic script (
Glagolitic alphabet) and literature, educating numerous future missionaries in their native language.
The principality was founded as a vassal of the east-Frankish (i.e. German) kings, but later it started resisting the influence of German feudal lords and clergy, trying to organize an independent Slavic archdiocese. Eventually, after Kocel's death in 876, it was again made part of the
Carinthia March of the East Frankish Empire. In
884 it was conquered by Great Moravia, 894 it became part of the East Frankish Empire again. In
896 the Franks gave the territory to the Slavic prince
Braslav in fief. Soon afterwards, in
901 it was conquered by the
Magyars, who terminated the remaining elements of Slavic self-organization. The territory became part of the arising
Hungarian state.
Parts of the principality
The principality consisted of:
★ the Balaton County - between present-day
Veszprém and
Drava River
★ the Ptuj County - surroundings of
Ptuj
★ the Dudlebian County - approximately between
Graz and Blatnohrad (
Zalavár)
★ probably also: (the former) Principality of
Etgar - approximately between
Kőszeg and
Klosterneuburg
★ temporary, it also included territory in the east of the Danube
[1] and in the south of the Drava,
[1] [3] i.e. parts of present-day central Hungary (between Danube and Tisa), northern Serbia (
Bačka, west
Syrmia) and eastern Croatia (west
Syrmia, east
Slavonia).
Rulers
★
Pribina (from 839/840 to 860/861)
★
Koceľ (from 860/861 to 876)
Sources
★ ''Kirilo-Metodievska enciklopedija'' (Cyrillo-Methodian Encyclopedia), in 3 volumes,
Bulgarian language, [DR5.K575 1985 RR2S], Sofia 1985
★ ''Welkya - Creation of Slavic Script'',
[1].
★ ''Dejiny Slovenska'' (History of Slovakia) in 6 volumes, Bratislava (volume 1 1986)
★ Steinhübel, Ján: ''Nitrianske kniežatstvo'' (Principality of Nitra), Bratislava 2004
Notes
1. Dragan Brujić, Vodič kroz svet Vizantije - od Konstantina do pada Carigrada, drugo izdanje, Beograd, 2005.
2. Dragan Brujić, Vodič kroz svet Vizantije - od Konstantina do pada Carigrada, drugo izdanje, Beograd, 2005.
3. http://www.vukovar.hr/povijest.htm