Events from 170

Marcus Aurelius writes Meditations - Stoic philosophy written during Germanic wars

Tatian creates Diatessaron - harmonized gospel account combining all four gospels into single narrative, widely used in Syria

Almadén mercury mining peaks - Romans extract cinnabar for vermillion pigment, later crucial for silver amalgamation

Marcus Aurelius drinks only water - Stoic emperor rejects wine as weakness, sets ascetic example