Book of the new sun (1-4) questions

Hi I just finished reading the botns again, and I have a few questions. I've searched for these in the list already, and couldn't find the answers. 1: what happened at the piteous gate? there was a riot, there were clone soldiers... did a member of severian's party cause all of that? 2: what was awakened in the cave? 3: how many times does severian die? all I can think of right now is: -drowned as a child -possibly died in the cart with agia -killed by the avern can't remember any more, but I remember someone mentioning on this list that he was killed by a big gun in the citadel? I haven't re read urth of the new sun yet though, so not asking about that, yet. Thanks for your help. (Reading island of Doctor Death and other stories and other stories at the moment)

Some think hethrir caused the riot with a beast. I've also seen suggestions that the guards were trying to get at Jonas.

The UotNS has a couple deaths, notably falling down the shaft in the ship.

~Maru