This question already has an answer here:
Normally, the close/lock/delete history of a post (including the reversal of such actions) is easily accessible along with the posts revisions.
However, if the post has not been edited (aside from closures/lockings/deletions), there is no link to the revision history, and no indication (aside from maybe comments) that the post was ever closed and reopened, locked and unlocked, or deleted and undeleted.
Of course, the revision history is still accessible via the direct URL, so the close/lock/delete history can be seen, but there is no indication that such history exists.
I propose that if there are no edits on a question that has been closed, locked, or deleted, there be a link to the revision history in the typical location, with a timestamp of the closure/locking/deletion activity.
It'd be useful to know by looking at the post that there is disagreement as to whether it should be open or closed, locked or unlocked, deleted or undeleted, and it's unclear enough that it's gone both ways without even being edited.
Another example is here: https://workplace.stackexchange.com/q/11006/869
The question was closed (and then reopened) by a moderator. There is a comment about expanding/improving the question, but no indication that it has been closed/reopened or why.