Consubstantiation is a belief held by certain Christians about the Eucharist. It holds that during the sacrament the Body of Christ enters the bread, and the Blood of Christ enters the wine, but they continue to be also bread and wine. Today some Christian faiths, notably Anglicanism and Lutheranism, profess the doctrine of Consubstantiation, whereas others profess the doctrines of Transubstantiation or Commemoration.

In England in the late 14th century, there was a political and religious movement known as Lollardy. Among much broader goals, the Lollards affirmed a form of consubstantiation -- that the Eucharist remained physically bread and wine, while becoming spiritually the body and blood of Christ. Lollardy was effectively ended with the execution of John Badby for heresy by burning at the stake.