The Kalmberg Atlas 1855
Click on the map (detail map loadsizes 260..500K)
The Helsinki Area
Along the coastline: Notice the optical telegraphy line
Turku - Tampere - Viipuri / Åbo - Tammerfors - Viborg
Click on the frame (each map about 900K)
Survey and drawing by The Russian Military Topographical Depot. 1855.
Maps from the collections of the Helsinki University Library. Edited by Pauli Kruhse.
Documents on the history of Finland