2016-07-09 13:05:35 GMT
32 other people
There are several thousand caves located beneath Orvieto, of which only 2 are open to the public.
A system of subterranean cisterns and wells, and a steady supply of pigeons raised in chambers with access to the bluff walls, made the city near siege-proof.
I can verify the pigeon is pretty good!
کبوتر خانه جهت جمع آوری کود
I'm sure they used the manure for their plants. Nothing wasted. :)
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