First trains (The George Stephenson Rocket, the first steam locomotive, 1829; The locomotive “North Star” by George Stephenson, 1837; The train of George Stephenson, 1865; Locomotive of Richard Trevithick, 1804)

First trains (Richard Trevithick invented a high-pressure steam engine in 1797) Background info: Locomotive of Richard Trevithick, 1804

Norwegian trains (EL 18; BM69; BM71; BM70)

Norwegian trains (BM73) Background info: The Norwegian rail network comprises 4,087 kilometers of railway line of which 2,622 kilometers are electrified and 242 are double-tracked. It has 696 tunnels and 2,790 bridges.

65th memorial anniversary of Frida Kahlo (Frida Kahlo (1907–1954) “Self-portrait on the Borderline between Mexico and the United States”, 1932; “The wounded deer”, 1946; “My Dress Hangs There”, 1933; “The Wounded Table” (detail), 1940) Background info: “Self-Portrait with Thorn Necklace and Hummingbird”, 1940

65th memorial anniversary of Frida Kahlo (Frida Kahlo (1907–1954) “My grandparents, my parents and me”, 1936) Background info: “The Love Embrace of the Universe, the Earth (Mexico), Myself, Diego, and Señor Xolotl”, 1949

65th memorial anniversary of Henri Matisse (Henri Matisse (1869–1954) “View of Collioure”, 1905; “The Joy of Life” (detail), 1905; “The Dessert: Harmony in Red”, 1908; “Woman in a Purple Coat” (detail), 1937) Background info: “Self-portrait”, 1900

65th memorial anniversary of Henri Matisse (Henri Matisse (1869–1954) “Dance”, 1910) Background info: “The goldfish”, 1912

500th memorial anniversary of Leonardo da Vinci (Leonardo de Vinci (1452–1519), Andrea del Verrocchio (c. 1435-1488) “The Baptism of Christ” (detail), 1472-1475; “Ginevra de' Benci” (detail), c. 1474-1478; “Madonna of the Yarnwinder” (detail), c. 1501; “Madonna Litta” (detail), c. 1490) Background info: Unknown artist “Lucan portrait of Leonardo da Vinci”, 1505-1510

500th memorial anniversary of Leonardo da Vinci (Leonardo de Vinci (1452–1519) “Annunciation” (detail), c. 1472–1475) Background info: “Virgin of the Rocks” (detail), 1483–1486

350th memorial anniversary of Rembrandt (Rembrandt van Rijn (1606–1669) “The Wedding Feast of Samson”, 1638’ “Danae” (detail), 1643; “Susanna at the Bath”, c. 1634; “Two philosophers in conversation”, c. 1628) Background info: “Self-portrait”, 1660

350th memorial anniversary of Rembrandt (Rembrandt van Rijn (1606–1669) “The Jewish Bride”, c. 1665-1669) Background info: “Balaam and the Ass” (detail), 1626

Tribute to Karl Lagerfeld (Karl Lagerfeld (1933–2019), Choupette)

Tribute to Karl Lagerfeld ( Karl Lagerfeld (1933–2019)) Background info: Choupette

Chang'e-4 on the dark side of the Moon (The lander landed on the hidden face of the Moon on January 3, 2019 in the crater Von Kármán, Chang'e 4; Rover)

Chang'e-4 on the dark side of the Moon (Chang'e 4)

50th anniversary of Apollo 11 landing on the Moon (Dr. Wernher von Braun (1912–1977), Launch of Saturn V; Crew, 1969; Apollo 11 Lunar Module “Eagle”, Apollo 11 landing site; Buzz Aldrin deploys the solar wind particle sensor)

50th anniversary of Apollo 11 landing on the Moon (Neil Armstrong (1930–2012) Background info: Apollo 11 is a mission of the American Space Program Apollo during which, for the first time, men landed on the Moon on July 20, 1969.

90th anniversary of Richard F. Gordon Jr. (Richard F. Gordon Jr. (1929–2017) and Apollo 12 Command Module; Richard F. Gordon Jr. (1929–2017) and Charles “Pete” Conrad Jr. (1930–1999); Gemini 11)

90th anniversary of Richard F. Gordon Jr. (Crew of Apollo 12: Charles Conrad Jr. (1930–1999), Richard F. Gordon Jr. (1929–2017), Alan LaVern Bean (1932–2018)

60th anniversary or the launch of Luna 1 (Upper floor of block E; Sergei Korolev (1907–1966), Luna 8K72; Trajectory of Luna 1)

60th anniversary or the launch of Luna 1 (Luna 1) Background info: Sergei Korolev (1907–1966), Luna 8K72

85th anniversary of Alexei Leonov (Apollo-Soyuz, the first joint space mission between the Soviet Union and the United States in 1975, Soyuz 19, Alexei Leonov; Voskhod 2, The first spacewalk ever, lasting 12 minutes; Thomas P. Stafford; The Soyuz rocket)

85th anniversary of Alexei Leonov (Valeri Koubassov (1935–2014), Alexei Leonov) Background info: Soyuz, Apollo, Voskhod 2

World-famous Nobel Prize winners: Mother Teresa (Mother Teresa (1910–1997), Nobel Peace Prize, 1979)

World-famous Nobel Prize winners: Howard Florey (Howard Florey (1898–1968), Nobel prize in physiology or medicine, 1993)

World-famous Nobel Prize winners: Liu Xiaobo (1955–2017), Nobel Peace Prize, 2010)

World-famous Nobel Prize winners: Piotr Kapitsa (1894–1984), Nobel prize in Physics, 1978)

Lighthouses (Petit Minou Lighthouse; Pointe Aux Barques Lighthouse; Cape Neddick Light; Boston Light) Background info: Split Rock Lighthouse, USA

Lighthouses (Tyrhaug Lighthouse) Background info: Portland Head Light