The Art Gallery of New South Wales has a beautiful old Parquet floor, in the original section. We examine the floor and the maintenance that would be required for it.
The Image below is a hardwood that looks to be Tallowood, and the border is Jarrah.
The blocks are all loose, but held tightly together by the tongue and groove system of the floor.
The reason they are loose is because they were originally adhered with Bitumen adhesive. Over time, this will become brittle, and needs to be reheated to reactive.
This floor requires special maintenance, and repairs need to be done by professionals.
We Love Parquet Have restored floors like this one before, and know about the maintenance required.
It is not a simple answer, because over washing the floor will destroy it.
The floor is of significance because it is a very well preserved reference to wood flooring in the days when Australian Manufacturing was protected.
Sadly, wikipedia does not mention the beautiful parquet floor, but you can learn about the building here.