

Glad I’m not the only one that noticed the odd bench. But I have another theory. It looks like a rotating device of some kind for the seat so that if the bench is wet from rain or covered in snow, one can rotate it to a dry side for a dry seat. I doubt the homeless, even the poor or lower classes, would have been allowed anywhere near such a garden as this anyway unless they were serving someone.
Go to a library. Ask a librarian. They may not be able to give some magic bullet answer (a fantasy anyway), but they can point you in the right direction to answer these kinds of questions for yourself.
But I suggest you narrow your focus. You might want to start out looking for topics a little less broad and vague as “time” and “joy”. That would be like trying to research 20th century music that incorporated drums or guitars.