A prominent Irish survivor of priestly sexual abuse told a Vatican-sponsored conference Friday that the Holy See must put in place "robust structures" and strong sanctions to hold accountable bishops and Vatican officials who fail protect children from predator priests.

Advocates of ordaining women as Roman Catholic priests cite the church's unfolding sex abuse scandals as powerful arguments for their cause, while acknowledging the high unlikelihood of achieving their goal anytime soon.

About 120 Catholics gathered on the steps of the Cathedral of St. Paul to pray for survivors of clergy sexual abuse and for a cleansing of the Catholic Church.

At the World Meeting of Families, Father Martin said LGBT people should be invited into parish ministries as "eucharistic ministers, music ministers, lectors, bereavement ministry, and every ministry."

“My faith in Jesus Christ is unchanged. I pray for the church and the bishops. I truly want there to be zero tolerance for abusers in the church and zero tolerance for those that enable and condone abusive behaviors.”