Art-Nouveau-style electric light fittings, while stained glass is a feature of all the main rooms. The ceilings throughout all the main floors are ornamented with good quality plasterwork, the Great Chamber being the most elaborate. The great four-sided clock in the building's tower was donated by Arthur Myers (MP and former Auckland mayor) and the Great Hall's pipe organ by Sir Henry Brett. The Town Hall project was championed by Myers before and during his time as mayor (1905–1909), and one of his last acts in office was to lay the foundation stone. The Town Hall's interior was extensively restored from 1994–1997 at a cost of NZ$33 million, partially because the unreinforced masonry structure did not meet earthquake standards. Australian engineering firm Sinclair Knight Merz pioneered various techniques to reinforce the structure without substantially changing the heritage character of the building. In 2007, the exterior underwent additional restoration work. A number of ornamental details on the exterior had been removed in the 1950s due to earthquake concerns, and some of the Oamaru limestone was damaged during aggressive stone cleaning. After careful research and analysis, these were replaced by limestone sourced from the same levels of the North Otago quarry that provided the original stone. Interior acoustic performance was corrected by the removal of earlier ill-judged and obtrusive intervention measures and their replacement by less-visible and more effective treatments. Interior paintwork was restored throughout to the original Edwardian-era colours. Complex fragmented porcelain and glazed ceramic tiling was restored with exact, new purpose-made replicas in the lavish main entrance foyer. The original carpet was recreated (for reference, a small portion of the original was left in one corner of the Council Chamber). The stained glass windows were restored and (where necessary), rebuilt and the entire building was unobtrusively fire protected. Town Hall Organ The Town Hall Organ, dating from 1911, is the largest musical instrument in the country, and is itself a 'Protected Object' in New Zealand law. It was extensively remodelled in 1969–1970 when the organ reform movement reached New Zealand, significantly altering and reducing its original Romantic-era power, discarding many parts of the original, and adding new ones to produce a then-fashionable Baroque sound. The resulting compromised instrument was dismantled in January 2008 for restoration and rebuilding. The rebuilt organ, incorporating remaining parts of the 1911 original, some recently recovered components, and new elements, was built by Orgelbau Klais of