Inter-Cooperative Council (ICC)
The Inter-Cooperative Council at Ann Arbor or ICC is a nonprofit cooperative that owns and maintains sixteen houses, including Escher. See their website for more information. The "Cooperatives 101" page has a nice introduction to the ICC and other nearby co-ops.
History
The ICC's "Our Roots" page has a great deal of information on the history of the ICC and a timeline of each of its houses.
Current events
The ICC Alumni Cooperator and Conifer Chronicle are great for staying up to date on ICC goings-on.