nearby Habsburg County of Tyrol, decreased, in 1464 the citizens wrote a constitution which was adopted as the rule for the peoples of the local guilds and political positions. The medieval county of Vaduz was formed in 1342 as a small subdivision of the Werdenberg county of the dynasty of Montfort of Vorarlberg. () was a historic state of the Holy Roman Empire In 1367 the League of God's House (Cadi, Gottes Haus, Ca' di Dio) was founded to resist the rising power of the Bishop of Chur. This was followed by the establishment of the Grey League (Grauer Bund), sometimes called Oberbund, in 1395 in the Upper Rhine valley. In the 14th century it was acquired by the Visconti, Dukes of Milan. In the 15th century the Swiss Confederates conquered the valleys south of the Alps in three separate conquests. The Lordship of Schellenberg was purchased by the Counts of Vaduz in 1437. Liechtenstein's borders have remained unchanged since 1434, when the Rhine was established as the border between the Holy Roman Empire and the newly formed Swiss cantons. The County of Vaduz () was a historic state of the Holy Roman Empire and Lordship of Schellenberg become the Principality of Liechtenstein in 1719. 19th Century When Graubünden became a Swiss canton in 1803, Chur was chosen as its capital. The lands of the Bishopric of Trent and Bishopric of Brixen were secularised and incorporated into the County of Tyrol. Mt. Piz Bernina (4,049 m) was given its name in 1850 by Johann Coaz, who also made the first ascent. The Brenner Railway was opened in 1867. Modern History Following World War I and the subsequent dissolution of Austria-Hungary, it was divided into two modern administrative parts through the Treaty of Saint-Germain-en-Laye. Lichtenstein also ended its customs union with Austro-Hungary in 1919. Lichtenstein started its customs union with Switzerland in 1924. The completion of the final portion of the FO railway occurred in 1926. It thus opened up the Cantons of Valais and Graubünden to further tourist development. This led to the introduction of Kurswagen (through coaches) between Brig and Chur, and between Brig and St. Moritz. The Grossglockner High Alpine Road (in German Großglockner-Hochalpenstraße) opened in 1935. Between 1943 and April 1945, Axis Forces held Innsbruck, which experienced 22 air raids by the Allied Forces and suffered heavy damage during World War 2. Switzerland and Lichtenstein remained neutral