COUNCIL OF CONSTANCE 1414-1418: Ecumenical XVI (against Wycliffe, Hus, etc.)
SESSION XIII (June 15, 1415)
Definition of Communion under One Species *
626 Since in some parts of the world certain ones have rashly presumed to assert that Christian people should receive the sacrament of the Eucharist under both species of bread and wine, and since they give communion to the laity indiscriminately, not only under the species of bread, but also under the species of wine, after dinner or otherwise when not fasting, and since they pertinaciously assert that communion should be enjoyed contrary to the praiseworthy custom of the Church reasonably approved which they try damnably to disprove as a sacrilege, it is for this reason that this present Council . . . declares, decides, and defines, that, although Christ instituted that venerable sacrament after supper and administered it to His disciples under both species of bread and wine; yet, notwithstanding this, the laudable authority of the sacred canons and the approved custom of the Church have maintained and still maintain that a sacrament of this kind should not be consecrated after supper, nor be received by the faithful who are not fasting, except in case of sickness or of another necessity granted or admitted by law or Church; and although such a sacrament was received by the faithful under both species in the early Church, yet since then it is received by those who consecrate under both species and by the laity only under the species of bread [another reading: And similarly, although this sacrament was received by the faithful in the early Church under both species, nevertheless this custom has been reasonably introduced to avoid certain dangers and scandals, namely, that it be received by those who consecrate it under both species, and by the laity only under the species of bread], since it must be believed most firmly and not at all doubted that the whole body of Christ and the blood are truly contained under the species of bread as well as under the species of wine. Therefore, to say that to observe this custom or law is a sacrilege or illicit must be considered erroneous, and those pertinaciously asserting the opposite of the above mentioned must be avoided as heretics and should be severely punished, either by the local diocesan officials or by the inquisitors of heretical depravity.