The Kingdom of Württemberg (German: Königreich Württemberg) was a Germanic state that existed from 1805 to 1918, located within the area that is now Baden-Württemberg. The kingdom was a continuation of the Duchy of Württemberg, which existed from 1495 to 1805. Prior to 1495, Württemberg was a County in the former Duchy of Swabia, which had dissolved after the death of Duke Conradin in 1268.

The borders of the Kingdom of Württemberg, as defined in 1813, lay between 47°34' and 49°35' north and 8°15' and 10°30' east. The greatest distance north to south comprised 225 kilometres (140 mi) and the greatest east to west was 160 kilometres (99 mi). The border had a total length of 1,800 kilometres (1,100 mi) and the total area of the state was 19,508 square kilometres (7,532 sq mi).

The kingdom had borders with Bavaria on the east and south, with Baden in the north, west and south. The southern part surrounded the Prussian province of Hohenzollern on most of its sides and touched on Lake Constance.

(Born: 1754 Elevated: 1797 Died: 1816)

Frederick II of the Duke of Württemberg assumed the title of King Frederick I on 1 January 1806. He abrogated the constitution, and united Old and New Württemberg. Subsequently, he placed the property of the church under government control, and greatly extended the borders of the kingdom by the process of mediatisation.

In 1806, Frederick joined the Confederation of the Rhine and received further territory with 160,000 inhabitants. Later, by the Peace of Vienna of October 1809, about 110,000 more people came under his rule. In return for these favours, Frederick joined French Emperor Napoleon in his campaigns against Prussia, Austria and Russia. Of the 16,000 of his subjects who marched to Moscow, only a few hundred returned. After the Battle of Leipzig in October 1813, Frederick deserted the French emperor and, by a treaty with Metternich at Fulda in November 1813, he secured the confirmation of his royal title and of his recent acquisitions of territory. Meanwhile his troops marched into France with the allies. In 1815, the King joined the German Confederation but the Congress of Vienna made no change to the extent of his lands. In the same year, he laid before the representatives of his people the outline of a new constitution but they rejected it and, in the midst of the commotion that ensued, Frederick died on 30 October 1816.

...
Wikipedia