-
fortification works.
Between 1863 and 1864
redoubts were
built on Vallisaari,
Kuninkaansaari and
Santahamina islands. In 1860s and 1870s
Russia purchased and then...
- 978-951-209-704-3. Nieminen, Jarmo: Aarresaaret-opas : Vallisaari,
Kuninkaansaari,
Lonna ja Isosaari. Helsinki: Gummerus, 2017. ISBN 978-951-240-747-7...