Francisco de Paula Castelló Aleu was a Spanish Roman Catholic killed during the Spanish Civil War on false accusations of fascism. Castelló was noted for his devout and outgoing nature in addition for his activism in Christian movements such as the Catholic Action; he had friends from these movements and in one met his fiancée though his death broke their soon-to-be union. He worked as a chemist for a time prior to conscription into the armed services on the eve of the civil war.