On this day (13 December) in the year 2001 Parliament of India was attacked by 5 terrorists . The perpetrators belonged to Lashkar-e-Taiba and Jaish-e-Mohammed. Both were Pakistan sponsered terrorist organisations. Here is a report:
Last week, Prime Minister initiated construction of new building for Parliament, which will look like this:

New Building would be ready by 2024, general elections. The interesting point is that the opposition does not seem to be happy about this development. Leaving aside other reasons there are legal reasons for their dismay. Delimitation of Parliament Constituencies was frozen about two decades back.
Delimitation
Under Article 82 of the Constitution, the Parliament by law enacts a Delimitation Act after every census. After coming into force commencement of the Act, the Central Government constitutes a Delimitation Commission. This Delimitation Commission demarcates the boundaries of the Parliamentary Constituencies as per provisions of the Delimitation Act. The present delimitation of constituencies has been done on the basis of 2001 census figures under the provisions of Delimitation Act, 2002. Notwithstanding the above, the Constitution of India was specifically amended in 2002 not to have delimitation of constituencies till the first census after 2026.
Demographic change:
The rural-urban demography has undergone massive change. Presently about 300 member of Parliament represent rural area and remaining represent urban area. The demography has undergone vast change. Presently 60% of population is in urban area or perhaps more. Therefore the present dominance of rural area in Parliament is likely to change. This means more say of middle class in power sharing of the government.
The New Parliament will have seating capacity of 900 members of Lok Sabha up from present 543 members. After 2026 a fresh census shall be held and thereafter A Delimitation Commission will delimit all the constituencies and this number of member is likely to go up. This would require each political party to re-caliberate it’s machinery to gear up for occasion but the opposition which is so disorganized that they can not even have a leader of opposition.
No wonder the Opposition is not happy. It is not the building that is target. It is the possible change after 2026 that worry them.