New Delhi, May 27 -- Prime Minister Narendra Modi will on Sunday inaugurate the country's new Parliament complex, in an occasion that will represent a landmark shift to a new building that will house the heart of India's democracy, amid an acerbic tussle between the Centre and several Opposition parties, who stayed firm on their plan to boycott the event.

Sunday's inauguration will mark the end of three years of construction work and showcase the highlight of the Bharatiya Janata Party (BJP)-led Union government's ambitious Central Vista revamp project. The new building is aimed at providing greater space and comfort for parliamentarians and modern amenities not available in its predecessor.

The sprawling complex will also symbolise the...