Estonia

On May 6, 2011 Estonian Post issueed the souvenir sheet dedicated to the Struve Geodetic Arc.

First Day Cover

Letter with souvenir postmark April 15, 1993 - 200 years birthday

Struve was born at Altona 15.4 1793, in what is now Germany, the son of Jacob Struve (1755–1841), and was the second of an entire family of astronomers through five generations. He was the great-grandfather of Otto Struve and the father of Otto Wilhelm von Struve. He was also the grandfather of Hermann Struve, who was Otto Struve's uncle.

In 1808 he entered the University of Tartu in the Russian Empire, where he first studied philology, but soon turned his attention to astronomy. From 1813 to 1820 he taught at the university and observed at Dorpat Observatory in Tartu, and in 1820 became a full professor and director of the observatory.

Friedrich Georg Wilhelm von Struve remained at Tartu, occupied with research on double stars and geodesy until 1839, when he founded and became director of the new Pulkovo Observatory near St Petersburg. Among other honors, he won the Gold Medal of the Royal Astronomical Society in 1826. He retired in 1861 due to failing health. He died 23.11.1864.

 ( copy from http://www.experiencefestival.com/a/Friedrich_Georg_Wilhelm_von_Struve_-_Life/id/1408840 )

"Woibifer" (Võivere) in Väike-Maarja Parish (59°03'28 N 26°20'16" E )
"Katko" (Simuna) in Väike-Maarja Parish (59°02'54 N 26°24'51" E )
"Dorpat" (Tartu Observatory) in Tartu. (58°22'43.64 N 26°43'12.61" E )