Australia itself is very old, but it isn't man made.

Sitting here, probably the oldest thing I can see is the Edwardian (what we'd call Federation) period fireplace surround that we found in a recycling co-op called "The Bower" It would probably be circa 1910. It's a lovely thing, with an oval mirror set in it.

To my left is the family piano. Not sure how old it is, but it's older than me. The actual house I'm in was probably built around the 30's or 40's. That's about as old as things get around here - except when John comes home tired after a hard day at the Child Care Centre, you would think he was several hundred years old to look at him!