Kostas Aggelakis collection (Herakleion, Crete) comprises books, maps and artifacts concerning navigation. Especially the collection displays 17 types of speedometers. It also comprises sextants, compasses and other instruments for navigation plotting. The instruments are dating from middle 19th century to middle 20th.century.
Kostas Aggelakis has donated to the Hellenic Archives of Scientific Instruments a Hughes sextant (c. 1938) and two speedometers.
John-Henry Hill was born in the U.S.A. in 1791. In 1821 he marries Fanny-Francis-Maria Mulligan, and together they come in Athens. In July 1831, Greece's first girls' school (Parthenagogeion) is founded in Plaka, near the Archaia Agora. In the beginning there were a few schoolgirls, but after a few years they reached the number of 500.