A fascinating bull on East-West issues by Benedict XIV, Papa Lambertini. Much of the material is still relevant today. Some of it, particularly the tone, is a bit dated (the Roman rite, being the rite of Roman, is naturally superior to all others and hence none can transfer to a Greek rite from it.... yeah....) yet most of the bull constituted a firm foundation for re-establishing Communion between the various Churches. Of keen interest is the Pope's reverence for Eastern customs and traditions (the liturgy, married clergy, reservations about pushing the Filioque on them). All this during the Counter-Reformation of all periods!