The mood was reflective yet celabratory as hundreds packed into St Patrick's Cathedral to pay their final respects.

Sorrow over his physical death was surpassed by faith in his eternal spiritual life.

Mr Marios lay in an open-casket at the front of the cathedral while the requiem mass took place.

Speaking as a friend of 40 years, former Liberal party MP for Ballarat East Barry Traynor eulogised the passing of Mr Marios, reflecting upon his versatile character.

"Nick Marios; the man in black, the bouncer, the boxer, the shooter, the restaurant owner, the politician and the dedicated family man," Mr Traynor said.

"He was a villain, but there was something I liked about him."

As well as his bold persona, Mr Marios's love of music was a dominant focus of the service. Naturally, melodious tunes ranging from the gospel to rock were included in the service.

Piano rocker Jerry Lee Lewis and Elvis Presley's guitarist James Burton were among Mr Marios's list of friends.

A letter written by Mr Burton himself was read out at the service, highlighting Mr Marios's passion for rock'n'roll.

"Don't cry for Nick," Mr Burton wrote. "He is in heaven now . . . waiting for us to meet with him."

A visual presentation following Mr Marios's great moments stirred up deep emotions within family and friends alike.

But nothing could dampen the laughs and joyous memories that were evoked by the eulogies.

"There are a sea of faces here with memories of Nick which will make them laugh, cry and shake their heads," Mr Traynor said.

"He was a very compassionate and generous man, and most of all he was exceptionally proud of his wife, children and grandchildren."