Secondo Pia (9 September 1855 – 7 September 1941) was an Italian lawyer and amateur photographer. He is best known for taking the first photographs of the Shroud of Turin on 28 May 1898 and, when he was developing them, noticing that the photographic negatives showed a positive image of the man in the shroud in addition to a clearer rendition of the image. The image he obtained from the shroud has been approved by the Roman Catholic Church as part of the devotion to the Holy Face of Jesus.