The 1169 Sicily earthquake, which occurs on February 4, 1169, at 07:00 on the eve of the feast of St. Agatha of Sicily (in southern Italy), has an estimated magnitude of between 6.4 and 7.3 and an estimated maximum perceived intensity of X (Intense) on the Mercalli intensity scale.

Catania, Lentini and Modica are severely damaged.

It triggers a tsunami.

Overall, the earthquake is estimated to have caused the deaths of at least fifteen thousand people.