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Łotwa - zabytki Listy Światowego Dziedzictwa UNESCO

Łotwa - podróże na ŁotwęŁotwa - mapa krajuŁotwa - spis artykułów i galeriiŁotwa - wiza, ambasady, przepisy wjazdowe, informacje dla kierowców, podróżowanie po kraju, przepisy celne, bezpieczeństwo, przydatne informacjeŁotwa - aktualna pogoda, roczny opad i temperaturaŁotwa - szczepienia, zdrowie, poradyŁotwa - kurs waluty, przelicznik na PLN, USD, EUROŁotwa - co zwiedzić, zabytki Listy Światowego Dziedzictwa UNESCOŁotwa - przewodniki, mapy, atlasy
Historic Centre of Riga  
Riga was a major centre of the Hanseatic League, deriving its prosperity in the 13th–15th centuries from the trade with central and eastern Europe. The urban fabric of its medieval centre reflects this prosperity, though most of the earliest buildings were destroyed by fire or war. Riga became an important economic centre in the 19th century, when the suburbs surrounding the medieval town were laid out, first with imposing wooden buildings in neoclassical style and then in Jugendstil. It is generally recognized that Riga has the finest collection of art nouveau buildings in Europe.
Struve Geodetic Arc  
The Struve Arc is a chain of survey triangulations stretching from Hammerfest in Norway to the Black Sea, through ten countries and over 2,820km. 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. This helped establish the exact size and shape of our planet and marked an important step in the development of earth sciences and topographic mapping. It is an extraordinary example of scientific collaboration among scientists from different countries, and of collaboration between monarchs for a scientific cause. The original arc consisted of 258 main triangles with 265 main station points. The listed site includes 34 of the original station points, with different markings, i.e. a drilled hole in rock, iron cross, cairns, or built obelisks.
Źródło: whc.unesco.org
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