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It is an extension of the Singapore Art Museum (SAM), with its name deriving from the museum's location at No. 8 Queen Street near Bras Basah Road.
It was through his gallery that he organized exhibitions of the Taiwanese sculptor Ju Ming at the Singapore Art Museum in 1986 and Place Vendôme in Paris in 1997.
In 2003, Koh donated 150 paintings by Singaporean artist Lim Tze Peng to the Singapore Art Museum.
He also met luminaries such as Rabindranath Tagore and Mahatma Gandhi during his stay in India, and got his sources of inspiration which led to the creation of iconic works such as the 4.21m-wide The Foolish Old Man Who Removed the Mountains painting on show at the Singapore Art Museum (SAM).
On February 16, 2001 Ng was presented with the Montblanc de la Culture Arts Patronage Award at a dinner ceremony held at the Singapore Art Museum.