Other contributors have said "Theatre of absurd?" is the same question as "Theater of absurd?" If you believe that these are not asking the same thing and should be answered differently, click here
There are quite a few famous plays of absurdist theatre, a few of them being 'Rosencrantz and Guildenstern are Dead' by Tom Stoppard, or 'Waiting for Godot' by Samual Beckett.