A few more variations of the Arkham Sanitarium logo today. If you haven't already read the comments from earlier I'd suggest giving them a look. There have been some excellent suggestions, and Raven in particular has contributed some fantastic research on a variety of topics.
There is much to like here. First off, I beefed up the snake a bit and cleaned up his geometry to strengthen the psi symbol. Second, I dropped the full shield surround down to the lower part of the design so I could enlarge the title. The key and torch, representing efforts to unlock the prison of the mind and the light of knowledge, balance nicely.
Several commenters on the earlier post suggested a single silhouette behind the psi and this was the first iteration of that. The rayed sun motif doesn't look half-bad, but I'm leery of adding too many "pointy" elements because I want a passive, non-threatening design.
Then again, I may be thinking too much.
Another iteration of the background element idea, this time echoing the curves of the psi symbol to emphasize it even more. I like this, but I worry that it's too modern looking.
Another try, taking the basic idea from above and blending it with the shape of a beacon basket from heraldry. I think it's weaker, and the beacon thing is probably too obscure.
Going back to the beginning and simply swapping the white background for black. I'm liking it. The multiple symbolic elements echo the overly arty seal designs of the past, but it has the clean layout of more modern designs without being too abstract. The black and white print version of the logo could drop the dark field altogether. If I wanted to go really period I could hand ink each of the elements and import them to replace the current versions.
As always, your feedback is greatly appreciated.