Prime Minister's Office (Sri Lanka) the Parliament. The office of prime minister was formed in 1947 with D. S. Senanayake becoming the first Prime Minister of Ceylon. It consisted of a Secretary (Permanent Secretary) and an Assistant Secretary, who were officers of the Ceylon Civil Service, and a Private Secretary, along with clerical and support staff based at the Senate Building along with the Senate, Cabinet office and the Ministry of External Affairs and Defence. Since 1960 the prime minister's office has been based at Sirimathipaya Mansion on Sir Ernest de Silva Mawatha (formerly Flower Road), Colombo which was the former residence of philanthropist Sir
House of Representatives (Ceylon) House of Representatives (Ceylon) The House of Representatives was the lower chamber of the parliament of Ceylon (now Sri Lanka) established in 1947 by the Soulbury Constitution. The House was housed in the old State Council building in Galle Face Green, Colombo and met for the first time on 14 October 1947. The First Republican Constitution of Sri Lanka, adopted on 22 May 1972, replaced the House of Representatives (and Parliament of Ceylon) with the unicameral National State Assembly. The House of Representatives initially consisted of 101 members, of whom 95 were elected by the electors of the 89 electoral