Everyone was Catholic
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We can be certain that not everyone was Catholic. There were Jews and Muslims, who would not have been likely to be involved in medieval theaters, but there were also a large number of heterodox and heretical medieval sects, and some other religions. Given the unorthodox nature of theatrical people, the political incorrectness of mummings, which were plays of a medieval type, I would guess that many religious views would have been represented among the actors and other people of the stage.
Religion
Religion
Christianity.
religion
Catholicism, the Roman Catholic version of Christianity, was the principal religion in medieval England
The greek-orthodox religion.
Religion was government
The majority were Catholic.
Medieval Europe, not just the bishops, followed Christianity, in the form of the Catholic religion, those head was the Roman Pope.
In medieval times, religion was not voluntary as it is now, but required and enforced by the government of each city, state or country. So the faith preference of the individual had little importance; the practices of the official religion were imposed and required of every citizen. So the answer to your question would be Yes, bakers would have been required to participate in the official religion and to at least appear to pray accordingly.
catholism yo
religion and death