TIFF file

From the dataset abstract

Guide map of Helsinki in Swedish and Russian from 1859. The quarter numbers were omitted from the map, and the street names were translated into Russian. The map refers to the railway under construction in Töölönlahti and the new theatre building at the western end of Esplanadi.

The image resolution is 500 dpi.

Source: Opaskartta Helsingin kaupungista vuodelta 1859