April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
May 18 » Khodynka Tragedy: A mass panic on Khodynka Field in Moscow during the festivities of the coronation of Russian Tsar Nicholas II results in the deaths of 1,389 people.
May 18 » The United States Supreme Court rules in Plessy v. Ferguson that the "separate but equal" doctrine is constitutional.
May 27 » The F4-strength St. Louis–East St. Louis tornado hits in St. Louis, Missouri, and East St. Louis, Illinois, killing at least 255 people and causing over $10-million in damage.
June 4 » Henry Ford completes the Ford Quadricycle, his first gasoline-powered automobile, and gives it a successful test run.
Day of death October 25, 1989
The temperature on October 25, 1989 was between 9.8 °C and 15.0 °C and averaged 11.9 °C. There was 1.3 hours of sunshine (13%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 1 » The Montreal Protocol comes into force, stopping the use of chemicals contributing to ozone depletion.
February 6 » The Round Table Talks start in Poland, thus marking the beginning of the overthrow of communism in Eastern Europe.
February 15 » Soviet–Afghan War: The Soviet Union officially announces that all of its troops have left Afghanistan.
May 30 » Tiananmen Square protests of 1989: The 10-metre high "Goddess of Democracy" statue is unveiled in Tiananmen Square by student demonstrators.
June 4 » Ali Khamenei is elected as the new Supreme Leader of the Islamic Republic of Iran by the Assembly of Experts after the death and funeral of Ayatollah Ruhollah Khomeini.
August 23 » Singing Revolution: Two million people from Estonia, Latvia and Lithuania stand on the Vilnius–Tallinn road, holding hands.
When copying data from this family tree, please include a reference to the origin: Alfred Groot, "Family tree Groot", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-groot/I2028.php : accessed February 17, 2026), "Henderikus Siebum (1896-1989)".
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