The temple in Greyport is currently Unhallowed.
We've conducted a Hallowing ritual, to try to break it, several times, without any change, despite getting messages of success.
This seems like a bug; surely Hallow cancels Unhallow?
Steps to reproduce the Bug:
Go to an unhallowed location, and complete a hallowing ritual
Expected Result:
Location is no longer unhallowed
Actual Result:
Location is still unhallowed
Screenshot(s)

And yet, after this, it was still unhallowed.