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Johannes Kepler was a German mathematician and astronomer who discovered that the Earth and planets move around the Sun in elliptical orbits.
Kepler created the three fundamental laws of planetary motion. He also did seminal work in optics and geometry, calculated the most accurate astronomical tables, and made many inventions and discoveries in physics on which further scientific discoveries by advanced scientists were based.
Louis-Léopold Boilly was a French painter and draftsman. A gifted creator of popular portrait paintings, he also produced a vast number of genre paintings vividly documenting French middle-class social life. His life and work spanned the eras of monarchical France, the French Revolution, the Napoleonic Empire, the Bourbon Restoration and the July Monarchy. His 1800 painting Un Trompe-l'œil introduced the term trompe-l'œil ("trick the eye"), applied to the technique that uses realistic imagery to create the optical illusion that the depicted objects exist in three dimensions, though the "unnamed" technique itself had existed in Greek and Roman times.
Max Schlichting was a German impressionist painter, father of the famous marinist Waldemar Schlichting. He studied painting at the Prussian Academy of Arts and the Académie Julian in Paris.
Max Schlichting also worked as a professor and art official. He is known for his French subjects and his depictions of landscapes in Flanders and the Netherlands. Schlichting was a member of the Berlin Association of Artists and the Berlin Secession.
Sir William Douglas Hamilton was a British diplomat, archaeologist and volcanologist, a famous collector, and a Fellow of the Royal Society of London.
He served as British Ambassador to the Kingdom of Naples from 1764 to 1800, but most importantly, he was a passionate researcher of history, art and natural sciences and was a member of the Society of Dilettantes, established for the purpose of studying ancient art.
In Naples, Hamilton amassed a unique collection of antique vases and published an illustrated book about them. In parallel, Sir Hamilton studied the volcanoes Vesuvius and Etna, local volcanic and seismic activity, and the causes of earthquakes in the Neapolitan territory. As a corresponding member of the Royal Society, he sent the results of his research to London. His publications were very valuable for the time.
