Pyotr Semenov-Tyan-Shansky
Encyclopedia
Pyotr Petrovich Semenov-Tyan-Shansky (2 January (New style
Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter...

: 14 January)
, 1827 – 26 February (New style
Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter...

: March 11)
, 1914) was a Russian
Russians
The Russian people are an East Slavic ethnic group native to Russia, speaking the Russian language and primarily living in Russia and neighboring countries....

 geographer
Geographer
A geographer is a scholar whose area of study is geography, the study of Earth's natural environment and human society.Although geographers are historically known as people who make maps, map making is actually the field of study of cartography, a subset of geography...

 and statistician
Statistician
A statistician is someone who works with theoretical or applied statistics. The profession exists in both the private and public sectors. The core of that work is to measure, interpret, and describe the world and human activity patterns within it...

 who managed the Russian Geographical Society
Russian Geographical Society
The Russian Geographical Society is a learned society, founded on 6 August 1845 in Saint Petersburg, Russia.-Imperial Geographical Society:Prior to the Russian Revolution of 1917, it was known as the Imperial Russian Geographical Society....

 for more than 40 years.

Pyotr Semenov was born into a noble family and studied in the Saint Petersburg University. Together with Dostoevsky he attended the secret meetings of the "Petrashevsky Circle
Petrashevsky Circle
The Petrashevsky Circle was a Russian literary discussion group of progressive-minded commoner-intellectuals in St. Petersburg organized by Mikhail Petrashevsky, a follower of the French utopian socialist Charles Fourier. Among the members were writers, teachers, students, minor government...

" (a literary discussion group of progressive-minded commoner-intellectuals in St. Petersburg). During the 1850s he went to study geography and geology
Geology
Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...

 in Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

 under Alexander Humboldt and Karl Ritter
Karl Ritter
Karl Ritter was a German diplomat, ambassador to Brazil, a member of the Nazi Party, Special Envoy to the Munich Agreement, a senior official in the Foreign Office during World War II, and convicted war criminal in the Ministries Trial.-Life:Karl Ritter was a graduate in law, and was appointed to...

, whose writings he translated into Russian.

On Humboldt's suggestion, Semenov decided to explore the largely unknown mountains of the Tian Shan
Tian Shan
The Tian Shan , also spelled Tien Shan, is a large mountain system located in Central Asia. The highest peak in the Tian Shan is Victory Peak , ....

. In 1856, he set off from Barnaul
Barnaul
-Russian Empire:Barnaul was one of the earlier cities established in Siberia. Originally chosen for its proximity to the mineral-rich Altai Mountains and its location on a major river, the site was founded by the wealthy Demidov family in the 1730s. In addition to the copper which had originally...

 on his first expedition, passing through the Altay Mountains
Altay Mountains
The Altai Mountains are a mountain range in East-Central Asia, where Russia, China, Mongolia and Kazakhstan come together, and where the rivers Irtysh and Ob have their sources. The Altai Mountains are known as the original locus of the speakers of Turkic as well as other members of the proposed...

 and visiting the Issyk Kul
Issyk Kul
Issyk Kul is an endorheic lake in the northern Tian Shan mountains in eastern Kyrgyzstan. It is the tenth largest lake in the world by volume and the second largest saline lake after the Caspian Sea. Although it is surrounded by snow-capped peaks, it never freezes; hence its name, which means "hot...

 on his way. In 1857 he returned to the Tian Shan, exploring the interior of this hitherto unknown mountain range. Semenov was the first European to see the scenic panorama of the Tengri Tag
Tian Shan
The Tian Shan , also spelled Tien Shan, is a large mountain system located in Central Asia. The highest peak in the Tian Shan is Victory Peak , ....

, and its most beautiful peak, the colossal Khan Tengri
Khan Tengri
Khan Tengri is a mountain of the Tian Shan mountain range. It is located on the China—Kyrgyzstan—Kazakhstan border, east of lake Issyk Kul. Its geologic elevation is , but its glacial cap rises to...

.

One of his most interesting discoveries was to disprove Humboldt's earlier claims about Tian Shan's supposed volcanic origins. Semenov found no evidence of volcanic activity anywhere in the mountains.
The next year, he published the first systematic description of the Tian Shan. The reputation of this monograph was such that half a century later Nicholas II of Russia
Nicholas II of Russia
Nicholas II was the last Emperor of Russia, Grand Prince of Finland, and titular King of Poland. His official short title was Nicholas II, Emperor and Autocrat of All the Russias and he is known as Saint Nicholas the Passion-Bearer by the Russian Orthodox Church.Nicholas II ruled from 1894 until...

 authorized him to add the epithet "Tian-Shansky" (that is, "of Tian Shan") to his last name.

Semenov also became interested in statistics
Statistics
Statistics is the study of the collection, organization, analysis, and interpretation of data. It deals with all aspects of this, including the planning of data collection in terms of the design of surveys and experiments....

 and did his best to advance this discipline in Russia. He served as Chairman of the Central Committee for Statistics from 1864 until 1874, when it was transformed into the Statistical Committee of the Ministry of Interior, of which he remained Chairman until 1891. It was largely due to his efforts that the first census
Census
A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...

 of the Russian Empire
Russian Empire
The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

 was held in 1897. The same year, he was made a member of the State Council of Imperial Russia
State Council of Imperial Russia
The State Council was the supreme state advisory body to the Tsar in Imperial Russia.-18th century:Early Tsars' Councils were small and dealt primarily with the external politics....

.

During his frequent visits to Switzerland, Italy, and France Semenov—a man of considerable fortune—amassed a collection of old Dutch masters, which later passed to the Hermitage Museum
Hermitage Museum
The State Hermitage is a museum of art and culture in Saint Petersburg, Russia. One of the largest and oldest museums of the world, it was founded in 1764 by Catherine the Great and has been opened to the public since 1852. Its collections, of which only a small part is on permanent display,...

 and was dissipated by the Soviets
Soviet sale of Hermitage paintings
The Soviet sale of Hermitage paintings in 1930 and 1931 resulted in the departure of some of the most valuable paintings from the collection of the State Hermitage Museum in Leningrad to western museums. Several of the paintings had been in the Hermitage Collection since its creation by Empress...

. His insect collection consisted of ca. 700,000 specimens, while more than a hundred new species were named after him. Semenov was a member of 53 learned societies and managed the Russian Geographical Society
Russian Geographical Society
The Russian Geographical Society is a learned society, founded on 6 August 1845 in Saint Petersburg, Russia.-Imperial Geographical Society:Prior to the Russian Revolution of 1917, it was known as the Imperial Russian Geographical Society....

 from 1873 until his death, using this position to encourage the exploration of inland Asia, notably by Nikolai Przhevalsky
Nikolai Przhevalsky
Nikolai Mikhaylovich Przhevalsky and Prjevalsky, ; —), was a Russian geographer of Polish background and explorer of Central and Eastern Asia. Although he never reached his final goal, Lhasa in Tibet, he travelled through regions unknown to the west, such as northern Tibet, modern Qinghai and...

 and Pyotr Kozlov
Pyotr Kozlov
Pyotr Kuzmich Kozlov was a Russian and Soviet traveler and explorer who continued the studies of Nikolai Przhevalsky in Mongolia and Tibet.Although prepared by his parents for military career, Kozlov chose to join Przhevalsky's expedition. After his mentor's death, Kozlov continued travelling in...

.

Semenov's memoirs were published after his death in four volumes. Several of his descendants, including a son, Andrey Semyonov-Tyan-Shansky
Andrey Semyonov-Tyan-Shansky
Andrey Petrovich Semyonov-Tyan-Shansky was a Russian entomologist specializing in beetles. He was the son of Pyotr Semyonov-Tyan-Shansky.He entered the St. Petersburg University in 1885...

, continued his work and became scientists of note.

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