Galileo Galilei arrived in Rome for his trial before the Roman Inquisition.
He was eventually placed under house arrest.
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Christmas was celebrated in Rome, marking the first time in recorded history that the holiday was celebrated.
The Fontana dei Quattro Fiumi, a fountain, was unveiled in Rome.
Galileo discovered the first three satellites of Jupiter.
A fire broke out in the evening and swept through the city of Rome, which lasted longer than a week.
Pope Hilarius became the Bishop of Rome.