The <a href="https://en.wikipedia.org/wiki/Fourth_Council_of_the_Lateran" id="mwLg" rel="mw:WikiLink" title="Fourth Council of the Lateran">Fourth Council of the Lateran</a> meets, defining the doctrine of <a href="https://en.wikipedia.org/wiki/Transubstantiation" id="mwLw" rel="mw:WikiLink" title="Transubstantiation">transubstantiation</a>, the process by which bread and wine are, by that doctrine, said to transform into the body and blood of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Christ" id="mwMA" rel="mw:WikiLink" title="Christ">Christ</a>.