 A still wider (24 metres) new tree-lined boulevard was that of Helsinginkatu, driven through the working-class district of Kallio, first outlined in 1887 by Sonck, but with further input from Nyström, and completed in around 1923.But even more ambitious than the town plan for Töölö were Eliel Saarinen's two plans also for Helsinki, the Munkkiniemi-Haaga plan of 1910-15 and the Pro-Helsingfors plan of 1918.The former was for a city development of 170 000, which equalled the entire population of central Helsinki at that time.