states. Within Stuttgart, the royal residence was expanded under Frederick although many of Stuttgart's most important buildings, including Wilhelm Palace, Katharina Hospital, the State Gallery, the Villa Berg and the Königsbau were built under the reign of King Wilhelm I. In 1818. King Wilhelm I and Queen Catherine in an attempt to assuage the suffering caused by the Year Without Summer and following famine, introduced the first Cannstatter Volksfest to celebrate the year's bountiful harvest. Hohenheim University was founded in 1818, and two years later the Württemberg Mausoleum as completed on the hill where Wirtemberg Castle once stood. From the outset of the 19th century, Stuttgart's development was once again impeded by its location (population of the city at the time was around 50,000), but the city began to experience the beginning of economic revival with the opening of the Main Station in 1846. Prior to then, the signs of rebirth in Stuttgart were evidenced by the construction of such buildings of Rosenstein Castle in 1822–1830, the Wilhelmspalais 1834–1840, and the foundations of the Staatsgalerie in 1843, University of Stuttgart in 1829, the University of Music and Performing Arts later, in 1857. Stuttgart had a role to play during the revolution of 1848/1849 as well. When internal divisions of the Frankfurt Parliament began the demise of that congress, the majority of the Frankfurt Congress voted to move to Stuttgart to flee the reach of the Prussian and Austrian armies in Frankfurt and Mainz. Even though the Congress may have had contacts with revolutionaries in Baden and Württemberg, the Congress, not popular with the content citizens of Stuttgart, were driven out by the King's army. Stuttgart's literary tradition also bore yet more fruits, being the home of such writers of national importance as Wilhelm Hauff, Ludwig Uhland, Gustav Schwab, and Eduard Mörike. From 1841 to 1846, the Jubiläumssäule was erected on the Schlossplatz before the New Palace according to the plans of Johann Michael Knapp to celebrate the rule of King Wilhelm I. A decade later, the Königsbau was constructed by Knapp and court architect Christian Friedrich von Leins as a concert hall. Another milestone in Stuttgart's history was the running of the first rail line from Cannstatt to Untertürkheim on 22 October 1845. The advent of Industrialisation in Germany heralded a major growth of population for Stuttgart: In 1834, Stuttgart counted 35,200 inhabitants, rose to 50,000 in 1852, 69,084 inhabitants