Óscar Arnulfo Romero y Galdámez (15 August 1917 – 24 March 1980) was a prelate of the Catholic Church in El Salvador. He served as Auxiliary Bishop of the Archdiocese of San Salvador, Bishop of Santiago de María, and finally as the fourth Archbishop of San Salvador.

Romero spoke out against social injustice and violence amid the escalating conflict between the military government and left-wing insurgents that led to the Salvadoran Civil War. For many people, his power came from the fact that he criticised both sides of the Salvadoran conflict. Instead of being partisan, biased, ideological, he looked at the facts, and he looked at the pain and the suffering of his people,… and he looked at what God’s kingdom expected of him: "The law of God which says thou shalt not kill, must come before any human order to kill… It is high time”, he said, “that you recover your conscience."

As Archbishop, he sacrificed his own safety to be "close to the poor & his people", as the US-backed Salvadoran army employed death squads and torture to stop leftist revolutionaries from seizing power. He was eventually killed by soldiers while celebrating a funeral Mass in a hospital chapel in March 1980. Though no one was ever convicted for the crime, investigations by the UN-created Truth Commission for El Salvador concluded that Major Roberto D'Aubuisson, a death squad leader and later founder of the right-wing Nationalist Republican Alliance (ARENA) political party, had ordered the killing.

In 1997, Pope John Paul II bestowed upon Romero the title of Servant of God and he was declared a martyr by Pope Francis on 3 February 2015, paving the way for his beatification on 23 May 2015. During Romero's beatification, Pope Francis declared that his "ministry was distinguished by his particular attention to the most poor and marginalised." Pope Francis made him a saint on 14 October 2018.

In 2010, the United Nations General Assembly proclaimed 24 March, the day of his death, as the "International Day for the Right to the Truth Concerning Gross Human Rights Violations and for the Dignity of Victims".

Latin American church groups often proclaim Romero an unofficial patron saint of the Americas and El Salvador; Catholics in El Salvador often refer to him as San Romero, as well as Monseñor Romero. He is also one of the ten 20th-century martyrs depicted in statues above the Great West Door of Westminster Abbey in London.

Picture above of Óscar Arnulfo Romero y Galdámez in 1978 on a visit to Rome. Photo first published in the Republic of Italy in the same year. It was also used by the Office for the Canonization Cause of Romero of the San Salvador Archdiocese
By Arzobispado de San Salvador; Congregatio de Causis Sanctorum - https://anep.or.cr/media/uploads/fotos/cyclope1_sin_cat/Romeroao4282_big.png, Public Domain, https://commons.wikimedia.org/w/index.php?curid=60457911