Struve Geodetic Arc

Brief description

The Struve Arc is a chain of survey triangulations stretching from Hammerfest in Norway to the Black Sea, through 10 countries and over 2,820 km. These are points of a survey, carried out between 1816 and 1855 by the astronomer Friedrich Georg Wilhelm Struve, which represented the first accurate measuring of a long segment of a meridian.

Unesco WHS list ref: 1187

I’ve never seen any of these sites.

From my collection

estonia-struve

Estonia – the observatory in Tartu (the top section of this card)

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Historic Centre (Old Town) of Tallinn

Brief description

The origins of Tallinn date back to the 13th century, when a castle was built there by the crusading knights of the Teutonic Order. It developed as a major centre of the Hanseatic League, and its wealth is demonstrated by the opulence of the public buildings (the churches in particular) and the domestic architecture of the merchants’ houses.

Unesco WHS list ref:  822

I have never been to Estonia.

From my collection

Estonia-tallinn

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