The year 573 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 181 Ab urbe condita. The denomination 573 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

• The Nemean Games are founded at Nemea, Greece. (traditional date)
• The Siege of Tyre (586–573 BC) ended. It was on-going for 13 years, it also had a significant connection with the Book of Ezekiel.
• Prophet Ezekiel has a vision of the Second Temple approximately 200-250 years before it was built.

• Duke Li of Jin, ruler of the State of Jin