Explanation:

• Himachal Pradesh Vidhan Sabha is housed in the Historical Council Chamber Building, which was built by the Britishers for the Central Legislative Assembly.
• Lord Reading, the then Viceroy of India inaugurated it, on August 27, 1925.
• Legendary Vithalbhai Patel was the first elected President (or Speaker) of the Central Legislative Assembly.
• On January 25, 1971, when HP made its debut as the 18th State of the Union of India, Council Chamber was chosen to house the HP Vidhan Sabha