'The art works have been sourced from my family collection, my gallery and from private collectors all over the country,' Bachhawat said.
Anirudh Daga of the Abani real estate group, who has donated seven works from his personal collection of Bhattacharya's paintings, has been collecting the master's works since three years before his death.
'I have a modest collection of pastels and water colours of which two are landscapes,' Daga told IANS.
Twenty of the 70 art works on display at the exhibition will be up for sale.
Born in 1940, Bhattacharya's first solo exhibition was held in Kolkata in 1965. He made a mark with his Doll Series in 1960s followed by a series of paintings on Goddess Durga in the same decade. He was inspired by Salvador Dali's works.
His paintings were also exhibited in Europe and US between 1969 ando 1985. In 2003, Bhattacharya was awarded the Lalit Kala Akademi fellowship for arts.
'His paintings are currently estimated between Rs.10 lakh and Rs.1 crore,' Bachhawat said.