Katy Perry has been branded 'disgusting' by nuns at the center of a court battle over a spectacular former convent in Los Angeles the singer wants to buy.

Sister Rita Callanan, 78, reveals the Order is so incensed about the sale of their one-time home they have now got the Pope involved, enlisting the help of his lawyer to help them win the case.

Along with Sister Rose Catherine Holzman, 86, the two women, who belong the Order of the Immaculate Heart of the Blessed Virgin Mary, are locked in a battle over who has the right to sell the mansion where they lived.

While they maintain the multi-million dollar property in LA's Los Feliz belongs to the nuns, the Archdiocese of Los Angeles says it is theirs.

Sister Callanan told DailyMail.com she would 'not be very happy at all if Perry got the property adding: 'I do not like Katy Perry's lifestyle.

Katy Perry has been branded 'disgusting' by nuns at the center of a court battle over a spectacular former convent in Los Angeles the singer wants to buy

Sister Rose Catherine Holzman, 86, (left) and Sister Rita Callanan, 78, (right) are locked in a battle over who has the right to sell the historic convent where they once lived

'I gave a lot of the things from the internet to show the Archdiocese what kind of woman she was.

'Some of the things she does are disgusting.'

She hit out at the 'I Kissed A Girl' star in the wake of a judge putting on hold again the decision that could either clear the way for Perry to buy the property in LA's Los Feliz, or leave the issue up to a jury.

Recalling a meeting the sisters had with the singer, Sister Callanan said: 'She brought her mother Mary to the meeting and I just thought, 'Oh God help us.'

'Katy Perry was all dressed very nicely and said: 'I have this tattoo on my wrist and it says Jesus.

'And I wanted to say, 'yes and what is the tattoo on your behind?'

The nun also quizzed Perry on remarks she had made about 'selling her soul to the devil' when she moved from Christian music into mainstream pop.

Speaking from her new home at St Bernadette Catholic Church in LA, she said she asked Perry what she wanted to do with her life.

The star responded: 'Well I don't know, that's why I want that property because I want to go down and sit down and drink green tea, and just go to the meditation garden and just meditate.'

Sister Callanan said: 'I just thought 'oh brother.'

She revealed she also asked Perry about her visit to Salem, which is synonymous with witchcraft: 'I asked her: 'you are into witchcraft, you went to Salem.'

The nuns argue that the multi-million dollar property (above) in LA's Los Feliz belongs to them - the Order of the Immaculate Heart of the Blessed Virgin Mary - but the Archdiocese of Los Angeles says it is theirs to sell to Katy Perry

Perry has offered $14.5million for the property (pictured) to Archbishop Jose Gomez when the sisters want to sell it to restaurateur Dana Hollister

'She looked over at one of her people and said: 'Did I go to Salem, was I in Salem?

'I said: 'Come on, you didn't know you were in Salem at a witchcraft thing. You don't remember it? That would stick way out in my mind. I read it, was that incorrect information?'

'I'm sorry but I am just not into witchcraft and I am just not into people who are into witchcraft.

'It disturbs me, and that was our mother house and our retreat house and it's sacred ground.

The nun revealed she has had her emails hacked, and been targeted by prank callers, as well as suffering from health problems, since she and her fellow sisters were moved from the property one by one by the archdiocese. The last nun left the site in 2011.

The stunning house which is causing all the ruckus was built in 1927 for Earle Anthony.

The broadcaster and entrepreneur enlisted the help of architect Bernard Maybeck.

Designed in an Italianate and Mediterranean style it has fountains, a pool, and stunning views over the San Gabriel mountains.

It was purchased by Daniel Donohue in 1961.

However despite its stunning design, the house has a dark past – Donohue's son committed suicide on the property.

He was also nearly murdered in 1969 by Charles Manson, when the killer broke into his bedroom.

Sister Callanan said she asked Perry about her visit to Salem, which is synonymous with witchcraft and Perry asked her 'people': 'Did I go to Salem, was I in Salem?

The nun replied: 'Come on, you didn't know you were in Salem at a witchcraft thing. You don't remember it?' Perry pictured participating in The Salem Witch Walk in 2014

At the same time, Manson's followers butchered couple Leno and Rosemary LaBianca in their own house which adjoins the property.

The Order moved in when the mansion was bequeathed to them by Donohue.

They insist they then paid him $600,000 for it over three years.

Sister Callanan says this is why the current archbishop, Jose Gomez, had no right to try and do a deal with the 'Ur So Gay' singer: 'What we are objecting to is the archbishop simply took our property and then literally tried to sell it to Katy Perry without even speaking to us.

'People don't realize we are a pontifical order - we are under the Pope, not the archbishop which means strictly speaking he did not have the right.

'This is why myself and Sister Catherine Rose are so adamant.

'For us to be thrown under the bus, like you just don't exist, it's terrible.

'That's why we are fighting right now.'

Perry has offered $10 million in cash and $4.5 million to buy and replace the retreat house which is lived in by priests on the site.

The new home would be owned by the nuns, through an institute which has held their property since 1970.

The nuns want to sell to Dana Hollister – a restaurateur and property developer, who has paid $10 million for a grant deed which is under dispute.

She plans to pay up to $5.5 million to go to the archdiocese to buy out the lease on the priests' house if they wanted her to.

She has so far paid $100,000 in cash and covered the $10 million with a note.

However there are claims her purchase is dependent on zoning controls which may not happen.

The nuns first learned that archbishop planned on selling the convent to a woman named Katherine Hudson in September 2014. They soon found out that woman was better known by the name Katy Perry

Perry told the nuns during a visit in May 2015 that 'she wanted to live on the property with her mother and grandmother, sit in the meditation garden, sip green tea and find herself'

The sisters are so incensed with the debacle they have taken their grievances all the way to the top and have now got a Signatura, the highest judicial authority in the Catholic Church, who works with the Pope, handling their case

The sisters are so incensed with the debacle they have taken their grievances all the way to the top and have now got a Signatura, the highest judicial authority in the Catholic Church, who works with the Pope, handling their case.

The nun said: 'We have a lawyer in Rome.

'I just don't think the Pope will let the Archbishop sell to Katy Perry.'

Sister Callanan who is now being called a 'renegade' by some in the Catholic Church, plants the fault for the ongoing court case firmly at the feet of Archbishop Gomez.

Citing an agreement they entered into some years ago with the archdiocese she said: 'When he sued us (in the civil court) I thought 'right you've done it.'

'We had a thing from Rome that all our sisters would be cared for at the manor, the village and the retreat house, and we had a retirement home.

'It said they would be cared for down to the last sister.

And we also had something written that they couldn't take the property.

'It says in the agreement for the property everything would be handled in Rome, but he (Gomez) did it civilly.

'I want the Pope to know what this man has been doing – this archdiocese needs to be cleaned out.

'I thought the archbishop might get rid of me from St Bernadette.

'I think he (Gomez) would probably be happy if I just dropped dead.

Sister Callanan said while the Order were at the property, they ran retreats, did charity work and built up a multi-million dollar business.

They also did many outreach projects to support those in need in the local community: 'We welcomed in the mothers of teenagers who had been shot in LA.

'And when the LA riots happened we had both the Koreans and the Hispanics into the place.

'They were fighting and wanted their own day. I said: 'uh uh, you can have a day of rest, and we will put out coffee and tea and Crunchies out for you, but you can all come together and pray together.

'There will be none of this separation.'

'I ran a retreat house for about 10 years, we did a lot of charity and good and this archbishop, it is like we don't exist.

'Granted I am supposed to have great respect but he tried to get away with something and I thought: 'uh-uh.'

Los Angeles Superior Court Judge Stephanie Bowick plans to have a ruling within two weeks and has set a status conference for April 4.