Wars, much of Further Austria, including the Breisgau, was by the 1801 Treaty of Lunéville granted as compensation to Ercole III d'Este, former duke of Modena and Reggio, who however died two years later. His heir as his son-in-law was Archduke Ferdinand of Austria-Este, the uncle of Emperor Francis II. After the Austrian defeat at the Battle of Austerlitz and the Peace of Pressburg in 1805, Further Austria was entirely dissolved and the former Habsburg territories were assigned to the Grand Duchy of Baden (Breisgau), the Kingdom of Württemberg (Rottenburg and Horb) and the Kingdom of Bavaria (Weitnau Günzburg, Weißenhorn), as rewards for their alliance with Napoleonic France. Minor estates passed to Hohenzollern-Sigmaringen and the Grand Duchy of Hesse. Fricktal had already become a French protectorate in 1799 and part of the Helvetic Republic in 1802, incorporated into the Swiss canton of Aargau the next year. After the defeat of Napoleon, there was some discussion at the Congress of Vienna of returning part or all of the Vorlande to Austria, but in the end only Vorarlberg returned to Austrian control, as Foreign Minister Klemens von Metternich did not want to offend the rulers of the South German states and hoped that removing Austria from its advanced position on the Rhine would reduce tensions with France. Administrative division As of 1790 Further Austria was subdivided into ten districts (Oberämter): Breisgau (with Fricktal) at Freiburg Offenburg: several localities in the present Ortenaukreis, the Imperial city of Offenburg not included Hohenberg, present Ostalbkreis, former county, at Rottenburg am Neckar Nellenburg, former landgraviate, at Stockach Altdorf (former Vogtei Swabia), today Weingarten Tettnang, former County of Montfort Günzburg, former Margraviate of Burgau Winnweiler in the Palatinate, former County of Falkenstein the former Imperial city of Konstanz Bregenz, present-day Vorarlberg, then administered from Tyrol. Habsburg rulers Politically, the Further Austrian territories were held by the Habsburg (Arch-)Dukes of Austria from 1278 onwards. Upon the 1379 Treaty of Neuberg, they together with Carinthia, Styria, Carniola and Tyrol fell to the Leopoldian line: Leopold III, until 1386 William, son, 1386–1406 Further divided into Inner Austria proper (Styria, Carinthia and Carniola) and Upper Austria (Tyrol and Further Austria), ruled by: Frederick IV, younger brother of William, 1406-1439 (regent in Further Austria since 1402) Frederick V, nephew of William, ruler of Inner Austria, 1439-1446 (regent) Sigismund, son of Frederick IV, 1446–1490 In 1490 all Habsburg possessions were re-unified under the