The main room upstairs was initially designed as a museum with appropriate lighting to protect artefacts. The contents of that museum were later given to the Ulster Museum for storage and exhibition.
The restoration project focussed on retaining the features of the original library, including the mosaic floor and striking stained glass window in the foyer.
The library serves as a community space and venue for education, training and development programmes.
The window portrays the Belfast Coat of Arms.
Images such as the bell, the seahorse, the ship and the chained wolf indicate the merchant classes and the maritime importance of Belfast.
The motto 'Pro tanto Quid Retribuamus' is Latin. It translates as 'What return shall we make for so much' and is part of Psalm 116 verse 12.