County Court Chief Judge Michael Rozenes said Ridsdale's "unfettered sexual deviance" had been a blatant breach of the trust existing between priests and parishioners.

Judge Rozenes said Ridsdale had preyed on his vulnerable victims under the guise of being the 'friendly priest'.

Ridsdale's position in the church involved a high degree of trust and some degree of power and his offending had had a devastating impact on his young victims.

The Catholic Church had unfortunately allowed Ridsdale's criminal behaviour to go unchecked for so long, Judge Rozenes said when jailing Ridsdale for eight years with a non-parole period of five years.

Ridsdale, who has been in prison since 1994 and is in poor health, had been due for release on June 29, 2019, from his previous jail sentences when he would be 85 before Tuesday's sentence was handed down.

He will now not be released, unless granted parole, until 2022 and is expected to die in prison.

Ridsdale's victims were as young as four years old and many were altar boys whose lives had been destroyed by the evil predatory priest.

When one boy dared to resist him, Ridsdale told him his conduct was "sinful" and he must go to confession to repent his sins. He abused another victim in the confessional box after ordering the young girl to say the prayer, "Forgive me Father for I have sinned".

Ridsdale told one nine-year-old boy that the abuse was "the Lord's work", described a four-year-old girl he was abusing as "God's little angel" and gave another victim a piece of communion bread as a reward for being abused.

He was moved from parish to parish after complaints and later admitted he could not have been as active as he was as a paedophile if he had not been a Catholic priest.

At one stage in 1994, he offered to be chemically castrated to try to have his then 18-year jail term reduced.

Ridsdale, 79, who has been in prison since 1994, was jailed on Tuesday for eight years with a non-parole period of five years after pleading guilty to 30 new charges involving sex offences against 11 boys and three girls.

He was first jailed for three months in 1993 after admitting to sexually abusing eight boys; jailed for 18 years in 1994 for sexually abusing 20 boys and one girl; and jailed for another 13 years in 2006 for sexually abusing 10 boys.

Ridsdale, who had been due for parole in August last year, was charged with these latest offences after more victims came forward to give evidence against him to the parliamentary inquiry into child sex abuse.

The Broken Rites victim support group believes the total number of Ridsdale's victims could be several hundred but many people have been reluctant to come forward.

When Ridsdale appeared for the first time in the Melbourne Magistrates Court in May 1993 to face sexual abuse charges, the now Cardinal George Pell was by his side for support.

Ridsdale had shared a house with Dr Pell for about a year from early 1973 at the St Alipius Presbytery, next door to the primary school, at Ballarat.

Dr Pell, then an auxiliary bishop of Melbourne, said at the time that Ridsdale "had made terrible mistakes". He said: "It was simply a gesture on my part."

Three years later, on the eve of his swearing-in as archbishop of Melbourne, Dr Pell said he had had "no idea" about Ridsdale's activities when they lived together.

"I lived there with him and there was not even a whisper," Dr Pell said then. "It was a different age, it was never mentioned."

Dr Pell, who has been been appointed the Prefect for the Economy of the Holy See, one of the Vatican's most senior roles responsible for reforming its administration and finances, has admitted he made a mistake supporting Ridsdale in 1993 but continues to insist he had 'little idea of the full extent and gravity of his crimes".

--THE AGE