Hi. The above wiki seems to have been recently deleted. Is there anyway to get it back?
Chances are the wiki was deleted for inactivity per the Dormancy Policy. I don't see the wiki at ManageWiki, so undeletion is not possible. There seems to be a backup at https://archive.org/details/wiki-2ndenlightenmentmirahezeorg_w.
You can request the wiki again at Meta, then request that the archive be imported. Depending on the size, you should do it either at Special:RequestImportDump at Meta, or here at Phabricator.