MIT has an excellent Architecture History, Theory & Criticism PhD - so that could be why back in 2011 it was up there.
I don't think an international equivalent exists, but you might find this useful for UK History of Art Programs: http://interactive.guim.co.uk/embed/2014/may/university-guide/?view=subject&subject=S345
There's also always the more general Times Higher Education rankings and others with a similar focus on the Universities as a whole and their research output, student experience etc.