- 1837: Gyldén, C.W. Map of Helsinki. Copyright for digital version University of Jyväskylä.
- 1897: Suomen Matkailija-Yhdistys: Suomi kartasto, Map of Helsinki. Copyright for digital version Pauli Kruhse / Histdoc.net.
- 1943: Aerial photos 1943, photographed 4 May ja 9 May 1943. Original source: Helsinki Region Infoshare.
- Background map: Microsoft Virtual Earth (Aerial), MapQuest OpenStreetMap tiles (Roads)