Dětmar, Thietmar or Dietmar; died 2 January 982 in Prague

Prague

Prague is the capital and largest city of the Czech Republic. Situated in the north-west of the country on the Vltava river, the city is home to about 1.3 million people, while its metropolitan area is estimated to have a population of over 2.3 million...

) was the first Bishop of Prague. He came from Saxony

Duchy of Saxony

The medieval Duchy of Saxony was a late Early Middle Ages "Carolingian stem duchy" covering the greater part of Northern Germany. It covered the area of the modern German states of Bremen, Hamburg, Lower Saxony, North Rhine-Westphalia, and Saxony-Anhalt and most of Schleswig-Holstein...

 and learned to speak Czech

Czech language

Czech is a West Slavic language with about 12 million native speakers; it is the majority language in the Czech Republic and spoken by Czechs worldwide. The language was known as Bohemian in English until the late 19th century...

. The diocese of Prague was assigned to the archbishopric of Mainz

Mainz

Mainz under the Holy Roman Empire, and previously was a Roman fort city which commanded the west bank of the Rhine and formed part of the northernmost frontier of the Roman Empire...

, when Thietmar was elected as the first bishop in 973 at the time of government by Boleslaus II of Bohemia

Boleslaus II of Bohemia

Boleslaus II the Pious was the duke of Bohemia from 972, a member of the Přemyslid dynasty.The son of Boleslaw also called Boleslaus I and Biagota, Boleslaus II became Duke in on his father's death. Boleslaus maintained good relations with the Ottonian German kings, and in 975 supported Otto II...

. The creation of the diocese gave 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...

 religious independence from the Empire

Holy Roman Empire

The Holy Roman Empire was a realm that existed from 962 to 1806 in Central Europe.It was ruled by the Holy Roman Emperor. Its character changed during the Middle Ages and the Early Modern period, when the power of the emperor gradually weakened in favour of the princes...

. Thietmar was known to be a wise and pious man, who ordered the building of many churches and the first cathedral. He died in 982. Adalbert of Prague

Adalbert of Prague

This article is about St Adalbert of Prague. For other uses, see Adalbert .Saint Adalbert, Czech: ; , , Czech Roman Catholic saint, a Bishop of Prague and a missionary, was martyred in his efforts to convert the Baltic Prussians. He evangelized Poles and Hungarians. St...

was elected as his successor.