I noticed the discussion earlier about Gallifrey and thought I’d share this little gem I found a while back. From what I know, it’s pretty accurate (or as accurate as can be possible given what there is to work with) based upon the descriptions in the books and comics and what little information the tv show has to offer. Some of it is creative licensing though.
It was found here. More updated versions of the Compendium can be found on the artist’s Deviant gallery here (but is sadly missing these pages).