Terribilità (Italian: 'terrible' in the sense of awe-inspiring) was the quality Giorgio Vasari attributed to Michelangelo — a superhuman force in his work that overwhelmed and intimidated the viewer. It describes not horror but sublimity: the sense that the work exceeds the human scale of expectation. The Moses (San Pietro in Vincoli, Rome) was so forceful that Michelangelo reportedly struck its knee and commanded it to speak. The Sistine Chapel ignudi — the muscular naked youths — operate at a scale and energy unprecedented in ceiling painting. Terribilità influenced the Mannerists who immediately followed Michelangelo and, through them, the entire tradition of Baroque dynamism. It was the first time an aesthetic quality was named after a specific artist rather than a technique — a tribute to his singular position.