The National Convention is an annual congregation of Architects organized by The Indian Institute of Architects. IIA NATCON 2015 was hosted by IIA WB CHAPTER on behalf of the National body to bring together the professionals to discuss and deliberate the various facets of Architectural development, practice and education and the future vision.

Ar. Ayan Sen was a part of the organising committee of the event where he was responsible in showing Ar. Fumihiko Maki, Ar. Rahul Gore, Ar. Rahul Mehrotra and a view of the city and managing a heritage walk through Kolkata along with Ar. Abin Chaudhuri and Conservation Architect Manish Chakraborti.

NATCON 2015 had a gracious presence of a galaxy of speakers from across the globe namely Ar. Fumihiko Maki (Tokyo), Ar. Rahul Mehotra (Mumbai/Boston), Ar. Boonserm Premthada (Bangkok), Ar. Peter Oborn (London), Ar. Peter Stutchbury (Australia), Ar. Vo Trong Nghia (Vietnam), Ar. Anupama Kundoo (Madrid), Yatin Pandya (India) along with a panel discussion by Ar. Narendra Dengle.