Zeni, who has left the Scientology group, said he was told to take a massive number of tablets as part of a 'purification' regime which cost him €1,800 to undergo.
He is seeking legal advice regarding his employment, and will assist authorities in employment and revenue sectors.
The city expanded rapidly from the 17th century and was briefly the second largest city in the British Empire before the Acts of Union in 1800.
Following the partition of Ireland in 1922, Dublin became the capital of the Irish Free State, later renamed Ireland.
They said they could not give it to him under the Data Protection Act.
The staff member would not answer questions on Zeni's employment, but provided an email address to contact instead.
His girlfriend became involved and he said the Scientologists flew her to LA for a month for training - it made him think that it was a professional organisation.
I would like to get the tablets tested and see what is in them," he said.
As well as doing the 'purification programme', Zeni said he was given a job working in the café and restaurant.
As of 2010, Dublin was listed by the Globalization and World Cities Research Network (Ga WC) as a global city, with a ranking of "Alpha-", which places it amongst the top thirty cities in the world.) "pool", referring to a dark tidal pool.
This tidal pool was located where the River Poddle entered the Liffey, on the site of the castle gardens at the rear of Dublin Castle.
In Modern Irish the name is Duibhlinn, and Irish rhymes from Dublin County show that in Dublin Leinster Irish it was pronounced Duílinn ().