Answer the question at the end by quoting:

Jean Desire Gustave Courbet (French: [gystav kuRbe]; 10 June 1819 - 31 December 1877) was a French painter who led the Realism movement in 19th-century French painting. Committed to painting only what he could see, he rejected academic convention and the Romanticism of the previous generation of visual artists. His independence set an example that was important to later artists, such as the Impressionists and the Cubists. Courbet occupies an important place in 19th-century French painting as an innovator and as an artist willing to make bold social statements through his work.
In the Salon of 1857 Courbet showed six paintings. These included Young Ladies on the Banks of the Seine (Summer), depicting two prostitutes under a tree, as well as the first of many hunting scenes Courbet was to paint during the remainder of his life: Hind at Bay in the Snow and The Quarry.  Young Ladies on the Banks of the Seine, painted in 1856, provoked a scandal. Art critics accustomed to conventional, "timeless" nude women in landscapes were shocked by Courbet's depiction of modern women casually displaying their undergarments.  By exhibiting sensational works alongside hunting scenes, of the sort that had brought popular success to the English painter Edwin Landseer, Courbet guaranteed himself "both notoriety and sales". During the 1860s, Courbet painted a series of increasingly erotic works such as Femme nue couchee.  This culminated in The Origin of the World (L'Origine du monde) (1866), which depicts female genitalia and was not publicly exhibited until 1988, and Sleep (1866), featuring two women in bed. The latter painting became the subject of a police report when it was exhibited by a picture dealer in 1872.  Until about 1861, Napoleon's regime had exhibited authoritarian characteristics, using press censorship to prevent the spread of opposition, manipulating elections, and depriving Parliament the right to free debate or any real power. In the 1860s, however, Napoleon III made more concessions to placate his liberal opponents. This change began by allowing free debates in Parliament and public reports of parliamentary debates. Press censorship, too, was relaxed and culminated in the appointment of the Liberal Emile Ollivier, previously a leader of the opposition to Napoleon's regime, as the de facto Prime Minister in 1870. As a sign of appeasement to the Liberals who admired Courbet, Napoleon III nominated him to the Legion of Honour in 1870. His refusal of the cross of the Legion of Honour angered those in power but made him immensely popular with those who opposed the prevailing regime.

what else did he paid that was controversial?

Young Ladies on the Banks of the Seine, painted in 1856, provoked a scandal.



Answer the question at the end by quoting:

Zhang Heng (Chinese: Zhang Heng ; AD 78-139), formerly romanized as Chang Heng, was a Han Chinese polymath from Nanyang who lived during the Han dynasty. Educated in the capital cities of Luoyang and Chang'an, he achieved success as an astronomer, mathematician, scientist, engineer, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar. Zhang Heng began his career as a minor civil servant in Nanyang. Eventually, he became Chief Astronomer, Prefect of the Majors for Official Carriages, and then Palace Attendant at the imperial court.
Zhang Heng's mechanical inventions influenced later Chinese inventors such as Yi Xing, Zhang Sixun, Su Song, and Guo Shoujing. Su Song directly named Zhang's water-powered armillary sphere as the inspiration for his 11th-century clock tower. The cosmic model of nine points of Heaven corresponding with nine regions of earth conceived in the work of the scholar-official Chen Hongmou (1696-1771) followed in the tradition of Zhang's book Spiritual Constitution of the Universe. The seismologist John Milne, who created the modern seismograph in 1876 alongside Thomas Gray and James A. Ewing at the Imperial College of Engineering in Tokyo, commented in 1886 on Zhang Heng's contributions to seismology. The historian Joseph Needham emphasized his contributions to pre-modern Chinese technology, stating that Zhang was noted even in his day for being able to "make three wheels rotate as if they were one." More than one scholar has described Zhang as a polymath. However, some scholars also point out that Zhang's writing lacks concrete scientific theories. Comparing Zhang with his contemporary, Ptolemy (83-161) of Roman Egypt, Jin Guantao, Fan Hongye, and Liu Qingfeng state:  Based on the theories of his predecessors, Zhang Heng systematically developed the celestial sphere theory. An armillary constructed on the basis of his hypotheses bears a remarkable similarity to Ptolemy's earth-centered theory. However, Zhang Heng did not definitely propose a theoretical model like Ptolemy's earth-centered one. It is astonishing that the celestial model Zhang Heng constructed was almost a physical model of Ptolemy's earth-centered theory. Only a single step separates the celestial globe from the earth-centered theory, but Chinese astronomers never took that step.  Here we can see how important the exemplary function of the primitive scientific structure is. In order to use the Euclidean system of geometry as a model for the development of astronomical theory, Ptolemy first had to select hypotheses which could serve as axioms. He naturally regarded circular motion as fundamental and then used the circular motion of deferents and epicycles in his earth-centered theory. Although Zhang Heng understood that the sun, moon and planets move in circles, he lacked a model for a logically structured theory and so could not establish a corresponding astronomical theory. Chinese astronomy was most interested in extracting the algebraic features of planetary motion (that is, the length of the cyclic periods) to establish astronomical theories. Thus astronomy was reduced to arithmetic operations, extracting common multiples and divisors from the observed cyclic motions of the heavenly bodies.

what was his greatest accomplishment?
It is astonishing that the celestial model Zhang Heng constructed was almost a physical model of Ptolemy's earth-centered theory.