A massive volcanic eruption (likely in Iceland or elsewhere) in 536 CE triggered a volcanic winter, causing widespread cooling, crop failures, and famine across Europe, Asia, and parts of the Americas for over a decade. Diminished sunlight led to summer snows and agricultural collapse, profoundly affecting societies from Byzantium to China. This event marked one of the coldest periods in the last 2,300 years, exacerbating existing instabilities.

The dim skies and hardships inspired apocalyptic imagery in Byzantine hymns and later echoed in Norse sagas and Chinese poetry describing 'yellow dust' and failed harvests. It influenced medieval literary motifs of darkness and divine retribution, resonating in Romantic poets like Byron's 'Darkness,' which contemplates global catastrophe. Modern ecopoets reference it as an early example of climate-driven literary expression on human vulnerability.