craftsmen, petty-bourgeois, retired soldiers and manufacturing workers. The southern part of the later was separated from traffic by trees and served as a parade ground, whereas the northern half remained a market. Beginning in the mid-18th century, the most important wool market in Germany was held in . Between 1752 and 1755, the writer lived in a house on Alexanderplatz. In 1771, a new stone bridge (the ) was built over the moat and in 1777 a colonnade-lined row of shops () was constructed by architect . Between 1783 and 1784, seven three-storey buildings were erected around the square by , including the famous , where lived as a permanent tenant and stayed in the days before his suicide. (1805–1900) On 25 October 1805 the Russian Tsar Alexander I was welcomed to the city on the parade grounds in front of the old King's Gate. To mark this occasion, on 2 November, King Frederick William III ordered the square to be renamed : In the southeast of the square, the cloth factory buildings were converted into the Theater by at a cost of 120,000 Taler. The foundation stone was laid on 31 August 1823 and the opening ceremony occurred on 4 August 1824. Sales were poor, forcing the theatre to close on 3 June 1851. Thereafter, the building was used for wool storage, then as a tenement building, and finally as an inn called until the building's demolition in 1932. During these years, was populated by fish wives, water carriers, sand sellers, rag-and-bone men, knife sharpeners and day laborers. Because of its importance as a transport hub, horse-drawn buses ran every 15 minutes between and in 1847. During the March Revolution of 1848, large-scale street fighting occurred on the streets of , where revolutionaries used barricades to block the route from to the city. Novelist and poet , who worked in the vicinity in a nearby pharmacy, participated in the construction of barricades and later described how he used materials from the Theater to barricade . The continued to grow throughout the 19th century, with three-storey developments already existing at the beginning of the century and fourth storeys being constructed from the middle of the century. By the end of the century, most of the buildings were already five storeys high. The large factories and military facilities gave way to housing developments (mainly rental housing for the factory workers who