Hippolyte Adolphe Taine (21 April 1828 – 5 March 1893) was a French critic and historian. He was the chief theoretical influence of French naturalism, a major proponent of sociological positivism, and one of the first practitioners of historicist criticism. Literary historicism as a critical movement has been said to originate with him. Taine is particularly remembered for his three-pronged approach to the contextual study of a work of art, based on the aspects of what he called "race, milieu, and moment".

Taine had a profound effect on French literature; the 1911 Encyclopædia Britannica asserted that "the tone which pervades the works of Zola, Bourget and Maupassant can be immediately attributed to the influence we call Taine's."

Taine was born in Vouziers, but entered a boarding school, the Institution Mathé, whose classes were conducted at the Collège Bourbon, at the age of 13 in 1841, after the death of his father. He excelled as a student, receiving a number of prizes in both scientific and humanistic subjects, and taking two Baccalauréat degrees at the École Normale before he was 20. Taine's contrarian politics led to difficulties keeping teaching posts, and his early academic career was decidedly mixed; he failed the exam for the national Concours d'Agrégation in 1851. After his dissertation on sensation was rejected, he abandoned his studies in the social sciences, feeling that literature was safer. He completed a doctorate at the Sorbonne in 1853, with considerably more success in his new field; his dissertation, Essai sur les fables de La Fontaine, won him a prize from the Académie française.

Olavo Luiz Pimentel de Carvalho (Campinas, April 29, 1947) is a Brazilian journalist,, and essayist on several issues like the history of astrology and mysticism; the history of revolutionary mentality; and philosophical anthropology, known for his conservative political stances, and for being a vehement critic of leftist.

Now living in the United States in the state of Virginia, he is an international correspondent and writes a weekly column for the Brazilian newspaper Diário do Comércio. He also teaches philosophy on a free course to over 1000 students online. Carvalho has previously written for several other magazines and newspapers, such as Bravo!, Primeira Leitura, O Globo, Época and Zero Hora, and taught philosophy to a smaller circle of students, while still living in Brazil. He also translated to Portuguese works of important philosophers of the 20th century, such as the Romanian Constantin Noica, the Spanish Xavier Zubiri, the French René Guénon, the German-American Eric Voegelin and Leo Strauss. He has commented and developed researches and theories on the works of Aristotle. He has also delivered lectures on his own work and on the work of several of those philosophers mentioned above.

Léon Joseph Florentin Bonnat (20 June 1833 – 8 September 1922) was a French painter.

He was born in Bayonne, but from 1846 to 1853 he lived in Madrid, where his father owned a bookshop. While tending his father's shop, he copied engravings of works by the Old Masters, developing a passion for drawing. In Madrid he received his artistic training under Madrazo. He later worked in Paris, where he became known as a leading portraitist, never without a commission. His many portraits show the influence of Velázquez, Jusepe de Ribera and other Spanish masters, as well as Titian and Van Dyke, whose works he studied in the Prado. Following the period in Spain Bonnat worked the ateliers of the history painters Paul Delaroche and Leon Cogniet (1854) in Paris. Despite repeated attempts, he failed to win the prix de Rome, finally receiving only a second prize. However, a scholarship from his native Bayonne allowed him to spend three years in Rome (1858–60) independently. During his stay in Rome, he became friends with Edgar Degas, Gustave Moreau, Jean-Jacques Henner and the sculptor Henri Chapu.

Leonardo di ser Piero da Vinci (Italian pronunciation: [leoˈnardo da ˈvintʃi]  pronunciation (help·info); April 15, 1452 – May 2, 1519, Old Style) was an Italian Renaissance polymath: painter, sculptor, architect, musician, scientist, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, and writer whose genius, perhaps more than that of any other figure, epitomized the Renaissance humanist ideal. Leonardo has often been described as the archetype of the Renaissance Man, a man of "unquenchable curiosity" and "feverishly inventive imagination". He is widely considered to be one of the greatest painters of all time and perhaps the most diversely talented person ever to have lived. According to art historian Helen Gardner, the scope and depth of his interests were without precedent and "his mind and personality seem to us superhuman, the man himself mysterious and remote". Marco Rosci points out, however, that while there is much speculation about Leonardo, his vision of the world is essentially logical rather than mysterious, and that the empirical methods he employed were unusual for his time.