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
- 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.
- Dionysios Trax, linguist
- Lucius Accius, Roman tragic poet
- Apollonius of Perga, Greek mathematician