I like the idea of using the 12 Community Districts, because those are official districts of the city, and do not have to be named and defined and explained and defended.  I suggest adding a CDs/neighborhood column to the tables and beginning to identify which is the CD for each entry.  When enough are identified, then split out separate list-articles.  Perhaps the CD's having most Landmarks get separate articles, and smaller CDs are left combined into one list-article.  Anyhow i would identify the CDs on this list-article and see how many are in each, before deciding on split to implement.  That would be a lot of work to do, but i don't see the need to rush to split, either.