Disasters with highest death tolls
St. Marcellus Flood
Holy Roman Empire
Saint Marcellus' flood or Grote Mandrenke was a massive southwesterly Atlantic gale (also known as a European windstorm) which swept across the British Isles, the Netherlands, northern Germany, and Denmark (including Schleswig/Southern Jutland) around 16 January 1362, causing at minimum 25,000 deaths.