Montejurra massacre
1976 CE.
Shown on the map at 42.627°, -2.057°.
The Montejurra incidents, was a neo-fascist terrorist attack that took place on 9 May 1976, when two Carlist members were killed and another three seriously wounded by right-wing gunmen at the annual Carlist Party celebration that was held in Montejurra, Navarre, Spain.
Text from the Wikipedia article Montejurra incidents, licensed CC BY-SA 4.0.