Following the Affair of the Placards, the French king leads an anti-Protestant procession through Paris.

The Affair of the Placards was an incident in which anti-Catholic posters appeared in public places in Paris and in four major provincial cities, Blois, Rouen, Tours and Orléans, in the night of the 17 to 18 October 1534. One of the posters was posted on the bedchamber door of King Francis I at Amboise, an affront and a breach of security that left him shaken. The Affaire des Placards brought an end to the conciliatory policies of Francis, which had formerly attempted to protect the Protestants from the more extreme measures of the Parlement de Paris, and also of the public entreaties for moderation of Philip Melanchthon.

Francis I was King of France from 1515 until his death in 1547. He was the son of Charles, Count of Angoulême, and Louise of Savoy. He succeeded his first cousin once removed and father-in-law Louis XII, who died without a legitimate son.

Protestantism is a branch of Christianity that emphasizes justification of sinners through faith alone, the teaching that salvation comes by unmerited divine grace, the priesthood of all believers, and the Bible as the sole infallible source of authority for Christian faith and practice. The five solae summarize the basic theological beliefs of mainstream Protestantism.

January 21 is the 21st day of the year in the Gregorian calendar; 344 days remain until the end of the year.