Circus (a conference unlike any other) started as an ObjectConference ages ago at ChristCollege in Oxford.
With special attention to patterns, ArchtictureAsMetaphor [3] and ChristopherAlexander [1] [4]

Program at: http://www.ot2000.org/programme.html

Help MartineDevos to prepare the FishBowl session on GotoStillConsideredHarmful
[2] 

See also: ObjectTechnologyConferences