CHENNAI, August 8: The twin tusk-shaped edifice marking the entrance to the Anna Memorial on Marina Beach here is to be replaced by an ornamental arch at a cost of over Rs 2.30 crore. A museum highligting the achievements and life of C N Annadurai, the late founder-leader of the Dravida Munnetra Kazhagam, would be set up. Besides this, statues of Anna, MGR and Kamaraj would be erected at the memorials to them, according to TN information minister Mullaivendan.