Collector and District Magistrate, SPS Nellore, Sri KVN Chakradhar babu IAS, paid floral tributes to Bharat Ratna Babasaheb Dr. Bhimrao Ramji Ambedkar on the occasion of his 66th death anniversary at VRC Centre, Nellore. District Administration has observed December 6 as Mahaparinirvan Divas to mark the death anniversary of Dr. Bhimrao Ramji Ambedkar, Chief architect of the Constitution.