Guy Fawkes (1570-1606), English conspirator, born in York. A Protestant by birth, he became a Roman Catholic after the marriage of his widowed mother to a man of Catholic background and sympathies. In 1593 he enlisted in the Spanish army in Flanders and in 1596 participated in the capture of the city of Calais by the Spanish in their war with Henry IV of France. He became implicated with Thomas Winter and others in the Gunpowder Plot to blow up Parliament as a protest against the anti-Roman Catholic laws. On the night of November 4-5, 1605, he was caught in a cellar underneath the House of Lords and arrested. After severe torture he disclosed the names of his accomplices, and with them he was hanged. Guy Fawkes Day is celebrated on November 5 in the United Kingdom and some other parts of the British Commonwealth with bonfires and fireworks.