Spytihněv I was Duke of Bohemia from 894/895 until his death.

He was the eldest son of Duke Bořivoj I, the first historically confirmed Bohemia

Bohemia

Bohemia is a historical region in central Europe, occupying the western two-thirds of the traditional Czech Lands. It is located in the contemporary Czech Republic with its capital in Prague...

n ruler of the Přemyslid dynasty

Premyslid dynasty

The Přemyslids , were a Czech royal dynasty which reigned in Bohemia and Moravia , and partly also in Hungary, Silesia, Austria and Poland.-Legendary rulers:...

, and his wife Ludmila. As he was still a minor upon his father's death in 899, the Bohemian lands were under the regency

Regent

A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...

 of his suzerain King Svatopluk I

Svatopluk I

Svatopluk I or Zwentibald I was the greatest ruler of Moravia that attained its maximum territorial expansion in his reign . His career had already started in the 860s, when he governed a principality, the location of which is still a matter of debate among historians, within Moravia under the...

 of Great Moravia

Great Moravia

Great Moravia was a Slavic state that existed in Central Europe and lasted for nearly seventy years in the 9th century whose creators were the ancestors of the Czechs and Slovaks. It was a vassal state of the Germanic Frankish kingdom and paid an annual tribute to it. There is some controversy as...

. After Svatopluk had died in 894 and an inheritance conflict arose between his sons Mojmír II

Mojmír II

Mojmir II was the last king of the Great Moravian Empire . Because of a civil war with his brother, he failed to prevent dismemberment of his Empire and probably died while fighting Magyar invaders....

 and Svatopluk II

Svatopluk II

Svatopluk II ruled the Principality of Nitra from 894 to 906 and strove to control all of Great Moravia.Svatopluk II was a younger son of Svatopluk I. As Prince of Nitra, Svatopluk II was subordinated to his older brother Mojmír II, the King of Great Moravia which contained the principality as its...

, Spytihněv took the occasion to free himself from Moravian vassalage. According to the Annales Fuldenses

Annales Fuldenses

The Annales Fuldenses or Annals of Fulda are East Frankish chronicles that cover independently the period from the last years of Louis the Pious to shortly after the end of effective Carolingian rule in East Francia with the accession of the child-king, Louis III, in 900...

, he appeared at the 895 Reichstag

Reichstag (Holy Roman Empire)

The Imperial Diet was the Diet, or general assembly, of the Imperial Estates of the Holy Roman Empire.During the period of the Empire, which lasted formally until 1806, the Diet was not a parliament in today's sense; instead, it was an assembly of the various estates of the realm...

 in Regensburg

Regensburg

Regensburg is a city in Bavaria, Germany, located at the confluence of the Danube and Regen rivers, at the northernmost bend in the Danube. To the east lies the Bavarian Forest. Regensburg is the capital of the Bavarian administrative region Upper Palatinate...

 and paid homage to the East Frankish king Arnulf of Carinthia

Arnulf of Carinthia

Arnulf of Carinthia was the Carolingian King of East Francia from 887, the disputed King of Italy from 894 and the disputed Holy Roman Emperor from February 22, 896 until his death.-Birth and Illegitimacy:...

.

Spytihněv is known for his alliance with Margrave Luitpold of Bavaria

Luitpold, Margrave of Bavaria

Luitpold , perhaps of the Huosi family or related to the Carolingian dynasty by Liutswind, mother of Emperor Arnulf of Carinthia, was the ancestor of the Luitpolding dynasty which ruled Bavaria and Carinthia until the mid-tenth century.In 893, he was appointed margrave in the March of Carinthia...

, who in 898 fought against Mojmír II, finally separating Bohemia from the Greater Moravian realm. Designed to protect Bohemia against the ravages of Magyar raiders, this pact also opened Bohemia to East Frankish Carolingian culture and paved the way for the eventual triumph of Roman Catholicism in Czech spiritual affairs. Spytihněv continued the extension of Prague Castle

Prague Castle

Prague Castle is a castle in Prague where the Kings of Bohemia, Holy Roman Emperors and presidents of Czechoslovakia and the Czech Republic have had their offices. The Czech Crown Jewels are kept here...

 as the administrative center of the Přemyslid duchy.