John Thomas Spike (born November 8, 1951 in New York City) is an American art historian, curator, and author, specializing in the Italian Renaissance and Baroque periods. He is also a prominent contemporary art critic and past director of the Florence Biennale. In 2007, Spike was appointed to the faculty of the Masters program in Sacred Art History jointly offered by the European University of Rome and the Pontifical Athenaeum, ‘Regina Apostolorum'. In 2011, Spike became a Distinguished Scholar in Residence at the College of William & Mary in Williamsburg, Virginia where he has also served as Assistant Director and Chief Curator of the Muscarelle Museum of Art since 2012.
Spike grew up in New York City and Tenafly, New Jersey where he was a friend and classmate of the actor Ed Harris at Tenafly High School. His father was the Rev. Robert W. Spike, a prominent figure in the Civil Rights Movement in the 1960s and his brother is Paul Spike, an author and the first American to be named editor of the British satirical magazine Punch. After undergraduate studies at Wesleyan University, he earned his PhD from Harvard University in art history in 1979. His dissertation was the first complete study of Mattia Preti (1613-1699), an important painter of the Caravaggio school. Spike was later awarded honorary citizenship of Taverna, the Italian city that was Preti's birthplace, in recognition of his studies of Preti. In 2013 HM Queen Elizabeth II appointed Spike to the Most Venerable Order of the Hospital of St John of Jerusalem.