The deuterocanonical books, meaning 'of, pertaining to, or constituting a second canon', collectively known as the Deuterocanon (DC), are certain books and passages considered to be canonical books of the Old Testament by the Catholic Church, the Eastern Orthodox Church, the Oriental Orthodox Church, and the Church of the East. In contrast, modern Rabbinic Judaism and Protestantism regard the DC as Apocrypha.
Seven books are accepted as deuterocanonical by all the ancient churches: Tobit, Judith, Baruch with the Letter of Jeremiah, Sirach or Ecclesiasticus, Wisdom, First and Second Maccabees and also the Greek additions to Esther and Daniel. In addition to these, the Eastern Orthodox Church and the Oriental Orthodox Church include other books in their canons.