Strange as it may seem, at one time there were cats living on Australia's famous landmark, the Sydney Harbour Bridge! Opened in 1932, the bridge has pylons at each end that were actually added as an afterthought, for aesthetic reasons and to reassure the public about the bridge's safety; they have no structural purpose.

In 1934 the south-east pylon was opened as a museum, with various tourist attractions; it was closed during WW2, but afterwards was reopened with further features. From about 1950 until 1971 the Pylon Lookout was managed by one Yvonne Rentoul; it included a tearoom, a post office, a souvenir shop, an 'All Australian Exhibition' of Australia's achievements — and a family of white cats!

They guarded a wishing well at the Lookout Point, and had their own merry-go-round — see the vintage brochure (left and enlargement from thumbnail below). They were accommodated in a rooftop cattery and became famous as one of the pylon's attractions. Photos are quite scarce, but there is one on display at the museum (still open but sadly without cats).

In 1953, when the bridge 'came of age' on its 21st birthday, the Portland Guardian carried quite a lengthy article about it, and at that time it seems from this brief mention that there were only two cats: 'On the roof of the pylon is Australia's highest roof-garden ... Two white cats, Sydney and Bridget, also live on the roof. They have never been to the ground.' Two years earlier the Sunday Herald had named them as Pylon and Bridget (see the Trove link below for article with photo).