Hotel Corona de Aragón fire
The Corona de Aragón Fire was an accidental fire that killed at least 80 people in the five-star Corona de Aragón Hotel in Zaragoza, Aragon, Spain on 12 July 1979. At the time of the event, the hotel lodged high-profile members of General Franco's family Carmen Polo, Carmen Franco y Polo and Cristóbal Martínez Bordiú, as well as many high-ranking military personnel, five of whom died in the fire.
Source: Wikipedia — Hotel Corona de Aragón fire (CC BY-SA 4.0)