In 1755, one of the most tragic earthquakes in human history occurred in Lisbon.

An excerpt from the article 37 facts about Portugal

It took place on November 1, 1755, at 9:40 in the morning. It left Lisbon almost completely ruined and most of the southern coast, up to the Algarve, destroyed. Immediately after the earthquake, there was a tsunami, the waves of which could reach a height of up to 20 m. Hundreds of fires also raged in the areas affected by the disaster. The disaster cost lives of 10.000 to 40.000 people in Lisbon alone. The strength of the quake was so great (9 on the Richter scale) that it was also felt by the inhabitants of Venice, as Giacomo Casanova noted in his memoirs.