The Old Parliament House, officially known as the Samvidhan Sadan, was the seat of the Parliament of India between 26 January 1950 and 18 September 2023. It housed the Lok Sabha and the Rajya Sabha respectively in India's bicameral parliament for nearly 73 years. Earlier it had served as the seat of the Imperial Legislative Council between 18 January 1927 and 15 August 1947, and the Constituent Assembly of India between 15 August 1947 and 26 January 1950.