Question: When did they build the astronomical clock in the city Jaroslav Drobný is from?

full_context: Document 1: Jaroslav Drobný: From 1938 to 1949 Drobný played center in the Czechoslovak ice hockey league. He was a Silver medalist with the Czechoslovak ice hockey team in the 1948 Olympics. In the final match, Czechoslovakia and Canada tied goalless but Canada won the gold medal due to a better overall goal average. Drobný scored 9 goals in 8 games at the Olympics. Jaroslav Drobný was also a member of the Czechoslovak national ice hockey team which won the gold medals at the 1947 World Ice Hockey Championships in Prague. He scored 15 goals in 7 games in the tournament including a hat-trick in the decisive victory over USA which gave his country its first ever World Championships title. In 1997, Drobný was inducted in the International Ice Hockey Federation (IIHF) Hall of Fame.
Document 2: Prague Castle: Prague Castle General information Architectural style Baroque and Mannerism Location 119 08 Prague 1, Czech Republic Current tenants Miloš Zeman, President of the Czech Republic and the First Lady Construction started 870; 1148 years ago (870) Completed 1929; 89 years ago (1929) Design and construction Architect Matthias of Arras and Peter Parler Website www.hrad.cz
Document 3: Jan Šindel: Jan Šindel was born in the Bohemian town Hradec Králové probably in the 1370s. As a young man he came to Prague to study at Charles University. In 1395 or 1399 he became the Master of Arts at Prague University. In 1406 he worked at the parish school of the St. Nicolas Church in the Lesser Town of Prague. Later he worked as a teacher of mathematics in Vienna, where he also studied medicine. Then he came back to Prague and became the professor of astronomy at Charles University, where he became Doctor of Medicine and rector of the university in 1410.
Document 4: Karel Stibor: Karel Stibor (5 November 1923 in Prague, Czechoslovakia – 8 November 1948 in La Manche) was an ice hockey player for the Czechoslovakian national team. He won a silver medal at the 1948 Winter Olympics.
Document 5: Radmila Chroboková: Radmila Chroboková (born 10 August 1976) is a Czech former ice dancer. With Tomáš Střondala, she placed seventh at the 1992 World Junior Championships in Hull, Quebec. She teamed up with Milan Brzý later that year and represented the Czech Republic at the 1994 Winter Olympics, finishing 16th. In the 1997–98 season, Chroboková won silver with Justin Lanning at the British Championships but the duo soon parted ways.
Document 6: Cubism: The leading Cubist architects were Pavel Janák, Josef Gočár, Vlastislav Hofman, Emil Králíček and Josef Chochol. They worked mostly in Prague but also in other Bohemian towns. The best-known Cubist building is the House of the Black Madonna in the Old Town of Prague built in 1912 by Josef Gočár with the only Cubist café in the world, Grand Café Orient. Vlastislav Hofman built the entrance pavilions of Ďáblice Cemetery in 1912–1914, Josef Chochol designed several residential houses under Vyšehrad. A Cubist streetlamp has also been preserved near the Wenceslas Square, designed by Emil Králíček in 1912, who also built the Diamond House in the New Town of Prague around 1913.
Document 7: Time: The most precise timekeeping device of the ancient world was the water clock, or clepsydra, one of which was found in the tomb of Egyptian pharaoh Amenhotep I (1525–1504 BC). They could be used to measure the hours even at night, but required manual upkeep to replenish the flow of water. The Ancient Greeks and the people from Chaldea (southeastern Mesopotamia) regularly maintained timekeeping records as an essential part of their astronomical observations. Arab inventors and engineers in particular made improvements on the use of water clocks up to the Middle Ages. In the 11th century, Chinese inventors and engineers invented the first mechanical clocks driven by an escapement mechanism.
Document 8: David Krejčí: David Krejčí (, born 28 April 1986) is a Czech professional ice hockey center serving as an alternate captain for the Boston Bruins of the National Hockey League (NHL). He was part of the Bruins' Stanley Cup win in 2011 and led the NHL in points during the 2011 and 2013 Stanley Cup playoffs. He was named to the Czech national team for the 2010 and 2014 Olympic teams.
Document 9: Prague astronomical clock: The oldest part of the Orloj, the mechanical clock and astronomical dial, dates back to 1410 when it was made by clockmaker Mikuláš of Kadaň and Jan Šindel, then later a professor of mathematics and astronomy at Charles University. The first recorded mention of the clock was on 9 October 1410. Later, presumably around 1490, the calendar dial was added and the clock facade was decorated with gothic sculptures.
Document 10: Astronomical clock: The first clock was built between 1352 and 1354 and stopped working sometime at the beginning of the 16th century. A second clock was then built by Herlin, Conrad Dasypodius, the Habrecht brothers, and others, between 1547 and 1574. This clock stopped working in 1788 or 1789 (as it apparently stopped working gradually, each component being disconnected
Document 11: Murray Dowey: Murray Albert Dowey, sometimes referred to as Murray Downey (born January 3, 1926), is a Canadian ice hockey goaltender. He was a member of the Ottawa RCAF Flyers who won the gold medal in ice hockey for Canada at the 1948 Winter Olympics in St. Moritz. In 2001 Dowey was honoured by the Canadian Forces when it was announced that the 1948 RCAF Flyers were selected as Canada’s greatest military athletes of the 20th century.
Document 12: Computer: Many mechanical aids to calculation and measurement were constructed for astronomical and navigation use. The planisphere was a star chart invented by Abū Rayhān al-Bīrūnī in the early 11th century. The astrolabe was invented in the Hellenistic world in either the 1st or 2nd centuries BC and is often attributed to Hipparchus. A combination of the planisphere and dioptra, the astrolabe was effectively an analog computer capable of working out several different kinds of problems in spherical astronomy. An astrolabe incorporating a mechanical calendar computer and gear-wheels was invented by Abi Bakr of Isfahan, Persia in 1235. Abū Rayhān al-Bīrūnī invented the first mechanical geared lunisolar calendar astrolabe, an early fixed-wired knowledge processing machine with a gear train and gear-wheels, circa 1000 AD.
Document 13: Ice hockey at the Olympic Games: In 1924, the tournament was played in a round - robin format, consisting of a preliminary round and a medal round. The medals were awarded based on win -- loss records during the medal round. This format was used until 1988, although the number of teams and games played varied slightly. The Toronto Granites, representing Canada, became one of the dominant hockey teams in Olympic history, outscoring opponents 110 -- 3, led by Harry Watson, who scored 36 goals. The United States won silver and Great Britain won bronze. Watson's 36 goals remains the tournament record for career goals. He also set the record for career points with 36 (assists were not counted at the time), which stood until 2010.
Document 14: Štefánik's Observatory: Štefánik's Observatory (, obs. code: 541) is an astronomical observatory on Petřín hill in the center of Prague founded 1928 and named after Slovak astronomer Milan Rastislav Štefánik. Nowadays the observatory specializes above all in popularization of astronomy and related natural sciences.
Document 15: Czechoslovakia: Věra Čáslavská was an Olympic gold medallist in gymnastics, winning seven gold medals and four silver medals. She represented Czechoslovakia in three consecutive Olympics.
ground_truth: 1410
sub_queries: What city is Jaroslav Drobný from? Answer: Prague
when was the astronomical clock in Prague built Answer: 1410