The venue makes sense to me in that he was raised Catholic and him wife is believer.YankeeFan said:Funeral was today at Holy Name Cathedral.
I assumed he was an atheist, and found the venue an odd choice.
In looking for confirmation, I came across his very thoughtful take on his belief (or lack thereof) in God:
http://blogs.suntimes.com/ebert/2009/04/how_i_believe_in_g.html