Samuele R. Bacchiocchi (29 January 1938 – 20 December 2008) was a Seventh-day Adventist author and theologian, best known for his work on the Sabbath in Christianity, particularly in the historical work From Sabbath to Sunday, based on his doctoral thesis from the Pontifical Gregorian University. Bacchiocchi defended the validity of the Feasts of the Lord, situated in Leviticus 23, he wrote two books on the subject. He was also known within the Seventh-day Adventist church for his opposition to rock and contemporary Christian music, jewelry, the celebration of Christmas and Easter, certain dress standards and alcohol. Biography Bacchiocchi was born in Rome, Italy on 20 January 1938. He later earned a Bachelor of Arts degree in theology from Newbold College in England, which was followed by a Master of Arts and Bachelor of Divinity at Andrews University in Michigan, United States; finishing in 1964. Bacchiocchi moved with his wife Anna to Kuyera, Shashamane district, Ethiopia, where he lectured in Bible and history. In 1969 they returned to Rome where Bacchiocchi studied at the Pontifical Gregorian University. He was the first non-Catholic to be admitted since its establishment in the 16th century. He completed a Doctoratus in Church History in 1974 on the subject of the decline of Sabbath observance in the Early Christian church, based on his research in the Vatican libraries. Bacchiocchi taught in the religion department of Andrews University from 1974 till his retirement in 2000. He taught theology and church history. He regularly presented seminars worldwide, and wrote many self-published books and articles on biblical topics. He was married to Anna Gandin Bacchiocchi. They had three children. In May 2007, Bacchiocchi announced that he had developed liver and colon cancer. He ultimately succumbed to 4th stage liver cancer, shortly after midnight, Saturday 20 December 2008, the day before what would have been his 47th wedding anniversary. He was with his three children and his wife. Impact In 1977 Bacchiocchi published From Sabbath to Sunday, documenting the historical transition from the Saturday Sabbath to Sunday in the early Christian church due to social, pagan and political factors, and also the decline of standards for the day. The book made an impact on the wider academic community outside Adventism, as well as within Adventism. Prior to his work, Seventh-day Adventists had focused on the role played by either the Pope, or by Roman Emperor Constantine I in the