The question asks which name Kolkata is NOT known by. Among the options, 'City of Palaces' is the one Kolkata is NOT typically known by. Kolkata IS known as 'City of Joy' (from Dominique Lapierre's book), 'City of Processions' (for its numerous cultural and religious processions), and 'Cultural Capital of India'. Therefore, the answer is A - this is the one it is NOT known by.