— Constantine the Great Roman emperor 274 - 337
Context: When we, Constantine and Licinius, emperors, had an interview at Milan, and conferred together with respect to the good and security of the commonweal, it seemed to us that, amongst those things that are profitable to mankind in general, the reverence paid to the Divinity merited our first and chief attention, and that it was proper that the Christians and all others should have liberty to follow that mode of religion which to each of them appeared best; so that that God, who is seated in heaven, might be benign and propitious to us, and to every one under our government. And therefore we judged it a salutary measure, and one highly consonant to right reason, that no man should be denied leave of attaching himself to the rites of the Christians, or to whatever other religion his mind directed him, that thus the supreme Divinity, to whose worship we freely devote ourselves, might continue to vouchsafe His favour and beneficence to us. And accordingly we give you to know that, without regard to any provisos in our former orders to you concerning the Christians, all who choose that religion are to be permitted, freely and absolutely, to remain in it, and not to be disturbed any ways, or molested. And we thought fit to be thus special in the things committed to your charge, that you might understand that the indulgence which we have granted in matters of religion to the Christians is ample and unconditional; and perceive at the same time that the open and free exercise of their respective religions is granted to all others, as well as to the Christians. For it befits the well-ordered state and the tranquillity of our times that each individual be allowed, according to his own choice, to worship the Divinity; and we mean not to derogate aught from the honour due to any religion or its votaries.
As translated in The Ante-Nicene Fathers (1886) edited by Alexander Roberts and James Donaldson, Vol. 7, p. 320 http://books.google.com/books?id=ko0sAAAAYAAJ&pg=PA320
Variant translation: When I, Constantine Augustus, as well as I Licinius Augustus fortunately met near Mediolanurn [Milan], and were considering everything that pertained to the public welfare and security, we thought —, among other things which we saw would be for the good of many, those regulations pertaining to the reverence of the Divinity ought certainly to be made first, so that we might grant to the Christians and others full authority to observe that religion which each preferred; whence any Divinity whatsoever in the seat of the heavens may be propitious and kindly disposed to us and all who are placed under our rule. And thus by this wholesome counsel and most upright provision we thought to arrange that no one whatsoever should be denied the opportunity to give his heart to the observance of the Christian religion, or of that religion which he should think best for himself, so that the Supreme Deity, to whose worship we freely yield our hearts, may show in all things His usual favor and benevolence. Therefore, your Worship should know that it has pleased us to remove all conditions whatsoever, which were in the rescripts formerly given to you officially, concerning the Christians and now any one of these who wishes to observe Christian religion may do so freely and openly, without molestation. We thought it fit to commend these things most fully to your care that you may know that we have given to those Christians free and unrestricted opportunity of religious worship. When you see that this has been granted to them by us, your Worship will know that we have also conceded to other religions the right of open and free observance of their worship for the sake of the peace of our times, that each one may have the free opportunity to worship as he pleases; this regulation is made we that we may not seem to detract from any dignity or any religion.
As translated in The Early Christian Persecutions (1897) by Dana Carleton Munro http://books.google.com/books?id=eoQTAAAAIAAJ&pg=PA29