A Polish man who was abused as a child by a priest is suing the country's Roman Catholic Church - the first such civil case in the country.
The man - who is only identified as 25-year-old Marcin K - is demanding 47,500 euros ($64,500; £39,550) in damages.
The priest has been convicted and is now serving a two-year jail sentence.
The church leadership apologised to all child abuse victims last year, but insisted it would not pay damages for the crimes of individual clergymen.
On Wednesday, the UN said the Vatican should "immediately remove" all clergy who were known or suspected child abusers.
In a report, the UN Committee on the Rights of the Child also denounced the Holy See for adopting policies which allowed priests to sexually abuse thousands of children.
Marcin K - who was abused by Father Zbigniew R between 1999 and 2001 - launched his case with the support from the Helsinki Foundation (HF) human rights group.
"It is the first civil lawsuit against the (Polish) Catholic church," HF representative Adam Bondar was quoted as saying by the AFP news agency.
"But there has never been a case in which a victim sues not just the perpetrator but also the church as an institution," he added.
Marcin K is also demanding a printed apology in the national press.
The church has argued that it not legally liable for the behaviour of the convicted priest, saying he had operated "independently" in his parish.
The Catholic Church is still influential in Poland, and it has largely been spared the sex abuse scandals that have made so many headlines in the West, but that is starting to change, the BBC's Adam Easton in Warsaw reports.
Last year, the Polish Papal Nuncio to the Dominican Republic, Archbishop Jozef Wesolowski, was accused of molesting boys.
The 65-year-old archbishop, who has since been recalled to Rome, is one of the highest ranking Vatican officials to be investigated for alleged abuse.