You'll have to excuse my ignorance and if I word something slightly awkwardly, but I did wonder how old is the tradition of burying the Genizot, or alternatively, if that is unknown, what is the oldest recovered Genizah site that we know of?
To my understanding, this tradition of paper-interment has been going on for long enough to potentially provide for an incredibly valuable historical record of events, long forgotten local cultures and so on. So which Genizot site was dated to be the oldest that also provided us with some insight into times of when these Hebrew-language books and papers were buried?