it saw a first construction boom in the 16th century. The 17th century brought decline to Weimar, because of changing trade conditions (as in nearby Erfurt). Besides, the territorial partitions led to the loss of political importance of the dukes of Saxe-Weimar and their finances shrunk. The city's polity weakened more and more and lost its privileges, leading to the absolutist reign of the dukes in the early 18th century. On the other hand, this time brought another construction boom to Weimar, and the city got its present appearance, marked by various ducal representation buildings. The city walls were demolished in 1757 and during the following decades, Weimar expanded in all directions. The biggest building constructed in this period was the Schloss as the residence of the dukes (north and east wing: 1789–1803, west wing 1832–1835, south wing: 1913–1914). Between 1708 and 1717 Johann Sebastian Bach worked as the court's organist in Weimar. Golden or Classical Age (1758–1832) The period from the start of the regencies of Anna Amalia (1758–1775) and her son Carl August (1775–1828) through to Goethe's death in 1832 is denoted as the "golden" or the "classical" age because of the high level of cultural activity in Weimar. The city became an important cultural centre of Europe, having been home to literary figures including Goethe, Schiller, Herder, Wieland and Bertuch; and in music the piano virtuoso Hummel. It has been a site of pilgrimage for the German intelligentsia since Goethe first moved to Weimar in 1775. Goethe was also active in civic duties while living there. He served as Privy Councilor to the Grand Duke of Saxe-Weimar-Eisenach for an extended period. The tombs of Goethe and Schiller, as well as their archives, may be found in the city. Goethe's Elective Affinities (1809) is set around the city of Weimar. In comparison to many major German states, the dukes' policy was liberal and tolerant in this period. The liberal Saxe-Weimar constitution was brought into effect in 1816. Silver Ages and The New Weimar (1832–1918) The time after Goethe's death is denoted as the "silver" age because Weimar remained an influential cultural centre. The first emphasis was fostering music. In 1842, Franz Liszt moved to Weimar to become the Grand Ducal court conductor. Liszt organized the premiere of Richard Wagner's Lohengrin (1850) as well as the world première of Saint Saëns' opera Samson et Delilah (1877) in the city.