Extensive developments took place during the 19th century. From 1847, the Spanisch-Brötli-Bahn, the first railway on Swiss territory, connected Zürich with Baden, putting the Zürich Hauptbahnhof at the origin of the Swiss rail network. The present building of the Hauptbahnhof (the main railway station) dates to 1871. Zürich’s Bahnhofstrasse (Station Street) was laid out in 1867, and the Zürich Stock Exchange was founded in 1877. Industrialisation led to migration into the cities and to rapid population growth, particularly in the suburbs of Zürich.