Chief Minister Naveen Patnaik, the son of the late leader, offered floral tributes to his father at a function in the assembly premises.
"On the 20th death anniversary of Biju Babu, we should remember all the great works he did for Odisha and tremendous sacrifices he made for the state," said the Chief Minister, who also visited the Biju Patnaik memorial in Puri to offer his tributes.
The Biju Janata Dal (BJD), which has been named after the legendary leader, organised several programmes across the state apparently to counter the impact of the BJP national executive meeting, which concluded in Bhubaneswar on Sunday.
In December last year, the Odisha government had decided to incorporate the life story of Biju Patnaik in their text books.
Bijayananda Patnaik, born on March 5 in 1916, was a two-time Chief Minister of Odisha.