In fact, it is a histoic museum, Susannah Place Museum, built in 1844, "located in the heart of The Rocks, one of Sydney's oldest areas and arguably the most appealing part of the city to tourists."
The Susannah Place 1844
Canon IXUS 50, F/2.8, 1/320 sec, ISO 50, 12:12, 17 September 2006.
I found a picture of the musuem at here. I reckon its composition and effect is much better than mine above. I will try taking another photo of the building later from the view of the Flockr one's.