Formerly known as John Heinrich Fuselli. Born in Zurich, Switzerland, his father is an art historian and his family is engaged in art work. But at first, the master of art felt that he had no artistic talent, gave up art to study theology and decided to become a priest. Foselli was forced to leave Zurich because he exposed political corruption. He went to Berlin first, 1764 settled in London, England, and met many literati who encouraged him. Joshua Reynolds gave him financial support, giving him the opportunity to see the rich resources of Italy, the hometown of art. From 1768 to 1769, he studied painting, Michelangelo and classical art in Rome, which had an important influence on his work style. He also showed a strange tendency to create an atmosphere of terror. 1788, Foselli married Sophie Rollins and became an alternate academician of the Royal Academy of Sciences. Two years later, he became an academician of the Royal Academy of Sciences. He sympathized with the French Revolution and enthusiastically supported robespierre. After the establishment of the reign of terror, robespierre, like other supporters, stood against robespierre. He spent several years running a commercial gallery, but it turned out that he had no talent for it. 1804 became a lifelong academician. 1825 buried in London at the age of 85.