Duchy of Kopanica

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Duchy of Kopanica

12th century – 13th century
Coat of arms
Karte Jaxa.jpg
Common languagesPolabian, Latin
Paganism, Christianity
GovernmentDuchy (Principality)
Historical eraMiddle Ages
• Established
12th century
• Conquered by the March of Lusatia
13th century
Preceded by
Succeeded by
March of Lusatia March of Lusatia
Today part of Germany

The Duchy of Kopanica (Principality of Kopanica Polish: Księstwo Kopanickie; German: Herzogtum Köpenick) was a Slavonic principality in Central Europe in present-day central and eastern Brandenburg. Its capital was Kopnik (German: Köpenick, today part of Berlin).

Coat of arms of the Polish branch of the Order of the Holy Sepulchre (Canons Regular of the Holy Sepulchre) established 1163 by Iakša de Kopnik in Kingdom of Poland

The Duchy was established as a Christian Duchy in the early 12th century and submitted to the Roman Catholic Archdiocese of Gniezno. It was a fief of the Kingdom of Poland in the mid-12th century. Its only ruler known by name was Iakša de Kopnik (1120-1176) of the Gryfici (Świebodzice) noble clan, a knight of the Order of the Holy Sepulchre.[1][2] Iakša's prominent relative Eric of Pomerania (1381-1459, House of Griffins) continued the family tradition and also became a knight of the Order of the Holy Sepulchre.

A bracteate of Jacza de Copnic. The Patriarchal cross held by the figure suggests a Christian ruler.
Tympanon of Iakša and his wife Agata (Agapia), Ołbin (Wrocław); around 1145

Until the Germanic invasion of the Wendish Crusade the Principality of Kopanica, supported by ancient noble families (Spyra, Duninowie…) from Silesia, issued at least five emissions of the brakteate of Iakša. Those brakteates from silver mines of Rosperk (Rozbark, Bytom) of the Spyra dynasty (ancestors of parts of the Piast dynasty) were minted by Iakša's father-in-law Pero Vlast (Piotr Włostowic) at Ołbin (Wrocław), then still Kingdom of Poland.

Despite Kopanica being a Catholic Principality, Iakša being a knight of Order of the Holy Sepulchre and the Kopnik currency depicting the Patriarchal cross used by the Polish branch of the Order (established in 1163 by Iakša himself in Miechów, Kingdom of Poland), the Germans invaded the Principality using the pretext of christianization.

Iakšas chappel of the Order of the Holy Sepulchre subsequently became Tempelhof of the Knights Templar and after the extermination of this mainly Celtic order in the beginning of the 14th century their property was taken by the Germanic Order of Saint John (Bailiwick of Brandenburg), known as Johanniterorden or simply Johanniter, which following strictly its germanization agenda became Lutheran.

The Bargello in Florence displays a sword believed to be that of Iakša de Kopnik.

Replica of the Eberswalde Hoard (containing a ducal cape) from Finów, next to Polish border, around 600 BCE; Neues Museum, Kopnik (Berlin)

The Jakšić noble family of Serbia may be connected to Iakša's own clan Gryfici (Świebodzice) or the ancient Spyra (Sperun, Pérnuš) their parent house, also known in Persia as House of Suren, Pahlavuni of Armenia and in ancient India as the mythical Aryan Iakšaku dynasty.

The Aryan (Sparian) and Amyrgian (Scythian) ancestors of the Gryfici (Świebodzice) noble clan ruled and protected the area at least 3000 years before the Principality of Kopanica was founded to stop the expansion of Germanic tribes and polities invading and polluting Europe from Scandza. The ducal cape found in the Eberswalde Hoard from Finów shows the eight-petaled star of Surya (Svarog), a Solar Deity venerated from prehistoric times and also assimilated into various religions, e.g. Aten, Helios, Mithras, Sol Invictus or Christ Pantocrator.


The Slavic (Veneti) name Kopnik means a place at which some kind of digging related to irrigating, building, mining, also building a kopiec (kurhan, kurgan, tumulus, barrow, mound) is being performed. Kopanica means an area belonging to or surrounding the place of Kopnik. Kopa is the name often used for mountains, also the original Vindelici name for the main mountain massive hosting kopalnie (mines) of the Hallstatt culture.

Branibor means the protecting forest/woods and is still used for this area by the Czechs.

Iakša (Jakša, Jaksa, Jaxa, Iacza, Jacek…) is derived from the paleolithic Indo-European root iskati meaning to strike/split/sliver [stones], to make sparks/light, to glitter/shine and is related to such ancient names as Iskra (spark), Iškur (lord of the sparks/thunderbolts) or Iakšartes (Iaxartes/Syr Daria - the river of the shining/sparkling truth/principle) - the sparkling river along which the main routes between the Indian subcontinent and Europe were used from prehistoric times.


The Duchy of Kopanica and the Kingdom of Poland in the early 12th century

The territory of the Principality of Kopanica, named after its capital Kopnik consisted of central and eastern parts of Branibor, which was later eventually renamed Brandenburg. In the late 12th century, in the west it bordered other territories of the Polabian Slavs (Veneti) and in the south White Serbia of the Serbs, which were annexed into Germanic Holy Roman Empire. In the east the Principality of Kopanica bordered the Kingdom of Poland, which it was a fief of.

From 1153/1154 to 1157 the Slavic settlement Branibor was part of the Duchy, until it was conquered by Albert the Bear and under the German name of Brandenburg it became capital of the newly established March of Brandenburg.

When in the years 1298-1405 the Kingdom of Bohemia incorporated the former White Serbia bordering Principality of Kopanica to the south it failed to incorporate their Slavic kinsmen of Kopanica and Branibor into their kingdom. Kingdom of Poland weakened by the Turko-Mongol invasions (up to 75% of casualties) also failed to recapture its fief.


  • Benedykt Zientara, Henryk Brodaty i jego czasy, Warszawa 2005;
  • Atlas historyczny do 1815 roku, pod red. Julii Tazbir, Warszawa 2005;
  • Tekst o Jaksie z Miechowa/Kopnika – dostęp: 30 grudnia 2009.
  1. ^ Fritze, Wolfgang H. (1982). Frühzeit zwischen Ostsee und Donau. Duncker & Humblot. p. 356. ISBN 9783428451517.
  2. ^ Cetwiński, Marek (1980). Rycerstwo Śląskie do końca XIII w. Pochodzenie. Gospodarka. Polityka. Wrocławskie Towarzystwo Naukowe. p. 70.