The book "Bible, Douay-Rheims, Book 03: Leviticus" in Chelner's translation is one of the components of the cultural heritage of Christianity. Leviticus is the third book of the Old Testament that contains much more than just legal laws for the Israelites. It tells about the rituals, sacrifices and regulations for people's lives in ancient times. This book also contains instructions for the priests and their service in the Sanctuary, as well as the laws of purity and inviolability. "Leviticus" helps to understand the history and traditions of Israel, their relationship with God and the inner moral world of the people of that time. This book is not only a source of religious thoughts, but also a material for studying the socio-cultural context of its time. "The Bible, Douay-Rheims, Book 03: Leviticus" offers the reader a deeper understanding of the world of ancient Israel and its relationship with the Most High.