Caesar has gone to the forum- a public place of government- to accept a petition, but he is taken to a room past the Theatre of Pompey. The exact location is said to be Campus Martius. It is on a false pretense of having Caesar read the document which is discovered to be fake.
So in a room past the Theatre of Pompey, on the Ides of March, 44 BC, Caesar is tricked and betrayed. He fights back valiantly, but soon realizes that his trusted Brutus is among his attackers. He utters the famous line, "Et tu, Brute--then fall, Caesar." He falls and is dead.
Caesar was assassinated in the Roman forum, but it is rumored that upon his death, Caesar fell at the foot of a statue of Pompey, Caesar's former co-ruler. The irony is that Caesar and Pompey were enemies, but Pompey met his demise at the hands of the Egyptians, not Caesar, when Pompey fled from Rome to Egypt.
"Et tu Brute" was not uttered by Caesar but was made popular in the play "Julius Caesar" by Shakespeare. Witneses described Caesar either saying nothing or uttering ""You too, child?" in Greek. He died lower steps of the portico in the Roman Forum.