The Optus Centre is located at 367 Collins Street, Melbourne. Standing 153 metres tall, it incorporates 34 floors, and was completed in 1975. The main foyer, and mezzanine areas are home to cafes and formerly, a branch of the Commonwealth Bank. Major tenants include Optus, Sportsbet, the Australian Institute of Company Directors, Insync and a donor centre for Australian Red Cross Lifeblood.