A conservation group has intensified its attack against what it says is Birmingham City Council's disregard of commercial and industrial heritage.
Birmingham Civic Society accused the council of failing to act to save architectural landmarks.
The society is highlighting the disappearance of two Birmingham icons - an early 20th century sculpture of a phoenix in Colmore Row and the Victorian Royal Coat of Arms at the former Birmingham Mint.
Stephen Hartland, chairman of the Civic Society planning committee, said he had been talking to the council for almost three years about the fate of the bronze phoenix which adorned the entrance to 78 Colmore Row, formerly the headquarters of Phoenix Assurance.
The sculpture was removed to allow the building to be refurbished and was taken to Manchester for restoration.
Mr Hartland said he had been given no guarantee that the phoenix would be returned.
The coat of arms above the former Birmingham Mint, in Icknield Street, was removed recently. The 200-year-old building was placed into the hands of administrators in May 2003 after the Mint went out of business.
Mr Hartland said both buildings were supposed to enjoy special protection because of their historic and architectural importance. The former Mint is a listed building and 78 Colmore Row is in a conservation area.
Mr Hartland added: "These are two very important pieces of art work with a direct link to the commercial and industrial history of Birmingham.
"Where are they? When will they be returning? What is the council doing about it?
"These are the questions the Civic Society is asking, but we are not getting answers. The council appears to have a cavalier attitude towards Birmingham heritage."
The phoenix was a copy of the sculpture that greeted visitors to Phoenix Assurance's head office in King William Street, London.
Although originally cast in bronze, the Birmingham version became covered in concrete slurry over the years giving it a stone- like appearance.
Mr Hartland said: "The building itself, 78 Colmore Row, is a rarity having been built during the Great War, between 1915-17, in the monumental classic style.
"It is understood that the concrete slurry was to be removed from the sculpture and the bird itself restored to a gleaming bronze in a manner approaching the original.
"The crowning glory will be when the phoenix returns to perch on its home plinth, if it can be found and coaxed back from up north."
Earlier this year the Civic Society accused the council of failing to use its legal powers to protect Birmingham's conservation areas.
The organisation said the planning department was guilty of allowing " architectural gems" to fall into disrepair in Moseley and Edgbaston.
The Civic Society is also fighting to have the railings replaced around the early 19th century statue of Nelson, in the Bullring shopping centre, in time for the 200th anniversary of the Battle of Trafalgar in October.
Bullring owners Hammersons believe the railings, which have sharp tips, would be a health and safety hazard and has asked the council for permission to leave the statue as it is.
Mr Hartland said: "The conservation areas advisory committee wants the railings put back in place and the matter will be coming to the council planning committee shortly.
"I don't know why this is being allowed to drag on. The council should have issued enforcement proceedings ages ago to force Hammersons to replace the railings."
A Birmingham City Council spokeswoman said: "We will look into the issues that the Civic Society has raised."