Andrew Foley, charged in connection with the death of a man with extensive head injuries, has been remanded in custody at Waterford District Court until next Wednesday.
Mr Foley (29) was charged following the discovery of the body of Thomas Jordan (49) in an apartment on William Street, Waterford, at approximately 5am on St Patrick's Day.
Gardaí made the discovery after being called to the scene.
The defendant, from Dunshaughlin, Co Meath, but with an address in William Street, Waterford, was charged under Section 3 of the Non-Fatal Offences Against the Person Act, 1967.
Garda technical experts carried out a forensic examination of the apartment, which was occupied by another man.
The accused man was arrested under Section 4 of the Criminal Justice Act, 1984.
He was held for questioning by detectives in Ballybricken Garda station.
According to Garda sources, the victim lived alone and was last seen alive at approximately 4pm on Wednesday.
Mr Jordan, originally from St John's Park in the city, had moved recently from Portlaw in Co Waterford to the William Street apartment.
Gardaí are awaiting the results of a postmortem examination, carried out by State Pathologist Dr Marie Cassidy, before preparing a file for the Director of Public Prosecutions.
Mr Foley presented himself to gardaí for questioning following the discovery.