Sometimes broken pieces of ancient farms and equipment are left on the ground and used as decoration for public parks and gardens.
These grindstones and columns can now be seen at one end of the public garden on via dei Giardini in Sesto San Giovanni. They are an interesting reminder of the agricoltural past of the town, somedating back to Roman times, long before the rise of the industry took over and boosted the population from a few thousands to nearly 100.000, some others were found in the Saint Nicolao area.
They were already in the garden when I was a child. At the time there was also a stone drinking through: I guess that was removed to prevent kids from jumping in and getting stuck or hurt, or maybe to prevent people from throwing waste in. We used to say that it was a former sarcophagus, with grim imagination I thought of mummies. Off on one side, a short pillar, maybe used to tie the animals, and a slate set horizontal to act as a seat.
At the time they were arranged slightly differently than the are now, more haphazardly. Other slates are used to pave a more or less level floor around the grindstones. I believe that these remains have been collected from the vicinity and just left, decades ago, in this green patch. They were debris, now they are ornament and almost a monument to our past.