A multi-room structure - evidence of specialized (civic or religious) activities at the Robinson's Lake site?

Milner, G. R. 1982. The Robinson's Lake Site (11-Ms-582): A Small Late Bluff Settlement. American Bottom Archaeology FAI-270 Site Reports, Vol. 10. University of Illinois Press, Urbana. Fig. 13, p.32

Image courtesy of the Board of Trustees of the University of Illinois and the Illinois Transportation Archaeological Research Program.