Rajasekharan Parameswaran (born 1964), also known as Marthandam Rajasekharan, is an Indian art director and self-taught painter from Tamil Nadu.
He holds two Guinness World Records.
The first one, from 2008, is for the world's largest easel painting.
The easel is 56.5' tall and 31' wide and holds a 25' tall and 50' wide portrait of Elamkulam Namboodiripad.
In 2010, the painting was also included in the Limca Book of Records.
His second Guinness World Record is for the largest Burr puzzle (known as 'edakoodam' in Malayalam), with each piece of the puzzle measuring 24' x 2' x 2', unveiled on 27 December 2017 at The Ravis Hotels and Resorts, Kollam, Kerala.
This is the second successful attempt at setting this record.
Parameswaran made his debut in film as art director with Naalu Pennungal (2007), for which he won the best art director state award.