According to Christian tradition, during the Last Supper, before he was arrested and later crucified, Jesus Christ instituted the "Eucharist", the transformation of bread and wine into his own body and blood, as he is the Lord. However, for Christians, particularly in Toledo , the wine is actually usually ignored, leaving only the bread, which is deemed more important in the " Corpus Christi ". If we look back to the turbulent times of the Medieval period, the concept of holy wine remained strong thanks to the drive and support of the Christian monks. However, the wine that was drunk in those days was nothing like the one that is used by the Church today, even if the guidelines of modern Canon law are followed.

The equipment used to grow and care for the vines and store and transport the grapes was rudimentary, and included clay pots, all sorts of wood in different sizes, or wineskins made with the hides of various animals, and this gave what was to be the "Blood of Christ" a somewhat unusual flavour.

For a long time, the Church wines in Toledo were exclusive to the Church itself, although they were no different from the wines drunk in the local taverns. Both types of wine would have been made and drunk in the same year, with no time to allow them to age to improve their flavour. They gave drinkers energy and good cheer, but those who imbibed in excess, without good judgment nor respect for the wine's effects, became intoxicated, and the sense of the substance being a Holy Wine was quickly lost.