The Constitutions of the Holy Apostles, or The Apostolic Constitutions, are an ancient work compiled between 375 and 390 A.D. dealing with all manner of Christian life and practice, both for clergy and laity. Its contents are divided into eight books, the first six of which are exceedingly ancient in their source, and the eighth is the least ancient. While this work is not written by Clement of Rome, whose name is affixed to it, it is an invaluable work that allows the modern Christian or scholar to peer back through time to see how a Christian ought to have lived. The implications of that are significant, considering Christians ought to desire true and authentic doctrine, and the earlier the testimony of that doctrine, it is surely closest to the original teaching.