Centuries: 3rd century BC -

**2nd century BC**- 1st century BC

Decades: 220s BC 210s BC 200s BC 190s BC 180s BC - **170s BC** - 160s BC 150s BC140s BC 130s BC 120s BC

Years: 175 BC 174 BC 173 BC 172 BC 171 BC - **170 BC** - 169 BC 168 BC 167 BC 166 BC 165 BC

**Events**

- Antiochus IV Epiphanes invades Egypt and installs Ptolemy Physcon as king.
- Parchment is invented, in Pergamum.
- The earliest known paved streets appear in Rome.
- Crates of Mallus visits Rome.

**Births**

- Dionysios Trax, linguist
- Lucius Accius, Roman tragic poet

**Deaths**

- Apollonius of Perga, Greek mathematician