Hartmann, Count of Württemberg
Encyclopedia
Hartmann I was the Count of Württemberg
Württemberg
Württemberg , formerly known as Wirtemberg or Wurtemberg, is an area and a former state in southwestern Germany, including parts of the regions Swabia and Franconia....

.

Hartmann I and his brother Ludwig III
Ludwig III, Count of Württemberg
Ludwig III was Count of Württemberg. He was probably married to a daughter of count Adalbert III von Dillenburg, whose name is unknown...

 both called themselves “Count of Württemberg”, at the time, so it is assumed that they administered the county together. Both were sons of Count Ludwig II
Ludwig II, Count of Württemberg
Ludwig II. was the count of Württemberg from 1158 to 1181.He was married to Willibirg , daughter of Hartmann III, Count of Kirchberg....

. Hartmann accompanied Otto IV to Rome
Rome
Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

 for his coronation as Holy Roman Emperor and served repeatedly as a witness in documents set up by the emperor in Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. After the election of Frederick II of Swabia
Duchy of Swabia
Swabia was one of the five stem duchies of the medieval German kingdom, and its dukes were thus among the most powerful magnates of Germany.-History:...

 as king and emperor, Hartmann and his brother switched their support to Frederick and later supported his eventual successor Henry VII
Henry VII, Holy Roman Emperor
Henry VII was the King of Germany from 1308 and Holy Roman Emperor from 1312. He was the first emperor of the House of Luxembourg...

.

Around 1200, Hartmann married the heiress to the county of Veringen in Upper Swabia
Upper Swabia
Upper Swabia is a region in Germany in the federal states of Baden-Württemberg and Bavaria. The name refers to the area between the Swabian Alb, Lake Constance and the Lech...

, thus acquiring lands including Altshausen, Burg Alt-Veringen and the county of eastern Apphagaues.

This article is translated (poorly) from that on the German Wikipedia
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