The two works were presented to Mercy Hospital by Jane Blennerhassett, the granddaughter of former owner of Marinoto Sir Percy Sargood, at a ceremony at the hospital last night.
Chairman of the hospital's board of directors Trevor Scott said Mrs Blennerhassett (76), now living in Wanaka, had been "in and out of the house" over a long period.
Her knowledge of it would be helpful for the forthcoming restoration of the 1878 building.
Mrs Blennerhassett, whose maiden name was Macpherson, lived opposite the house in Newington Ave during her childhood and remembered visiting for Sunday lunches and playing in the grounds, including rolling snowballs in winter.
When Mr Scott discussed the restoration with her, she had mentioned she had the works of art "in the back shed somewhere".
She had originally bought them for her mother who had since died.
The hospital paid for them to be restored.
Their presence in the hospital foyer would draw people's attention to the restoration project.
At this stage the hospital has spent about $100,000 on an assessment by a conservation architect, Mr Scott said.
It was expected the restoration would cost several million dollars and take several years to complete.
The hospital would be contributing a "seven figure" sum towards it, but other funding would also be sought.
The restoration would include restoring its turrets, a conservatory and the slate roof.
The building is used for functions, meetings and some hospital training.
Sir Percy, who died in 1940, had owned the house from 1902.
