Palace–Mavelikkara Palace) were launched during the reign of Sree Chithira Thirunal. He also started the industrialisation of the state, enhancing the role of the public sector. He introduced heavy industry in the State and established giant public sector undertakings. As many as twenty industries were established, mostly for utilizing the local raw materials such as rubber, ceramics, and minerals. A majority of the premier industries running in Kerala even today, were established by Sree Chithira Thirunal. He patronized musicians, artists, dancers, and Vedic scholars. Sree Chithira Thirunal appointed, for the first time, an Art Advisor to the Government, Dr. G. H. Cousins. He also established a new form of University Training Corps, viz. Labour Corps, preceding the N.C.C., in the educational institutions. The expenses of the university were to be met fully by the Government. Sree Chithira Thirunal also built a beautiful palace named Kowdiar Palace, finished in 1934, which was previously an old Naluektu, given by Sree Moolam Thirunal to his mother Sethu Parvathi Bayi in 1915. Controversial Policies of C.P. Ramaswami Iyer However, his Prime Minister, C. P. Ramaswami Iyer, was unpopular among the communists of Travancore. The tension between the Communists and Sir C.P. Ramaswami Iyer led to minor riots in various places of the country. In one such riot in Punnapra-Vayalar in 1946, the Communist rioters established their own government in the area. This was put down by the Travancore Army and Navy. Attempted Independence of Travancore as a fully sovereign nation The Prime Minister issued a statement in June 1947 that Travancore would remain as an independent country instead of joining the Indian Union; subsequently, an attempt was made on the life of Sir C.P. Ramaswamy Iyer, following which he resigned and left for Madras, to be succeeded by Sri P.G.N. Unnithan. According to witnesses such as K.Aiyappan Pillai, constitutional adviser to the Maharaja and historians like A. Sreedhara Menon, the rioters and mob-attacks had no bearing on the decision of the Maharaja. Annexation into the Republic of India After several rounds of discussions and negotiations between Sree Chithira Thirunal and V.P. Menon, the King agreed that the Kingdom should accede to the Indian Union in 1949. On 1 July 1949 the Kingdom of Travancore was merged with the Kingdom of Cochin and the short-lived state of Travancore-Kochi was formed. Republic of India era Formation of the state of Kerala The two kingdoms of Travancore