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| UNESCO#583; © Pentti Harala Ky, Espoo |
Sent by dollart from the Postcrossing Meeting in Helsinki, 14/02/2012
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| UNESCO#583; © ? |
Sent by dollart from the International Postcrossing Meeting in Helsinki, 03/08/2013
"Built in the second half of the 18th century by Sweden on a group of islands located at the entrance of Helsinki's harbour, this fortress is an especially interesting example of European military architecture of the time."In: UNESCO
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