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In Eastern Christianity, Eustathius the Great Martyr, his wife and two children, who were put into a red-hot metal ox to die for refusuing Hadrian's order to offer sacrifices to the gods, and for declaring themselves Christians, were deemed holy martyrs when three days later, the brass bull was opened and their dead bodies were found unscathed.
Here are some ways you can observe this day according to Eastern Christian tradition: