Michelangelo Merisi (or Amerighi) da Caravaggio ( 29 September 1571? – 18 July? 1610) was an Italian artist active in Rome, Naples, Malta, and Sicily between 1592 (1595?) and 1610. His paintings, which combine a realistic observation of the human state, both physical and emotional, with a dramatic use of lighting, had a formative influence on Baroque painting. Caravaggio trained as a painter in Milan under Simone Peterzano who had himself trained under Titian. In his twenties Caravaggio moved to Rome where there was a demand for paintings to fill the many huge new churches and palazzos being built at the time. It was also a period when the Church was searching for a stylistic alternative to Mannerism in religious art that was tasked to counter the threat of Protestantism. Caravaggio's innovation was a radical naturalism that combined close physical observation with a dramatic, even theatrical, use of chiaroscuro which came to be known as tenebrism (the shift from light to dark with little intermediate value).