Emir Mohammed Alim Khan (1880–1944) was the last emir of the Manghit dynasty, the last ruling dynasty of the Emirate of Bukhara in Central Asia. He reigned from January 3, 1911 to August 30, 1920, and was a direct descendant of Genghis Khan, the first Great Khan.

Thomas Young (June 13, 1773 – May 10, 1829) was an English scientist, researcher, physician and polymath. He is sometimes considered to be "the last person to know everything": that is, he was familiar with virtually all the contemporary Western academic knowledge at that point in history. Clearly this can never be verified, and other claimants to this title are Gottfried Leibniz, Leonardo da Vinci, and Francis Bacon, among others.

Astronaut Buzz Aldrin, lunar module pilot, walks on the surface of the Moon near the leg of the Lunar Module (LM) "Eagle" during the Apollo 11 extravehicular activity (EVA). Astronaut Neil A. Armstrong, commander, took this photograph with a 70mm lunar surface camera. While astronauts Armstrong and Aldrin descended in the Lunar Module (LM) "Eagle" to explore the Sea of Tranquility region of the Moon, astronaut Michael Collins, command module pilot, remained with the Command and Service Modules (CSM) "Columbia" in lunar orbit.

The only known photograph of Frédéric Chopin.

Frédéric François Chopin (IPA: [fʁedeʁik fʁɑ̃swa ʃɔpɛ̃]), (March 1, 1810^[1] – October 17, 1849) is one of the most famous, influential and admired composers for the piano, and Poland's most significant composer.

Walt Whitman (born Walter Whitman) (May 31, 1819 – March 26, 1892) was an American poet, essayist, journalist, and humanist born in West Hills, Huntington on Long Island in New York. His most famous works are the poetry collections Leaves of Grass and Drum-Taps.

Photo credit: George C. Cox (1887), Source: Library of Congress.

Albert Einstein (March 14, 1879–April 18, 1955) was a German-born theoretical physicist, who is widely regarded as the greatest scientist of the 20th century. He proposed the theory of relativity and also made major contributions to the development of quantum mechanics, statistical mechanics, and cosmology. He was awarded the 1921 Nobel Prize for Physics for his explanation of the photoelectric effect in 1905 (his "miracle year") and "for his services to Theoretical Physics."

Photo credit: Oren Jack Turner, Source: Library of Congress.