Martin Luther arrived at the Diet of Worms in Worms, Germany.

A “Diet” was an important governmental meeting in the Holy Roman Empire. Luther’s hearings over his writings and their heresy were set at 4 pm the next day.

Luther appeared before the Diet of Worms on April 17, 1521. He was informed that he had been called to the meeting to acknowledge as his own the books that had been published in his name and to repudiate them. He briefly acknowledged the books but requested time to ponder his second answer, which was granted.