Thrissur is a revenue district of Kerala situated in the central part of that state. Spanning an area of about 3,032 km2, Thrissur district is home to over 10% of Kerala’s population. Thrissur district was formed on July 1, 1949, with the headquarters at Thrissur City. Thrissur is known as the cultural capital of Kerala, and the land of Poorams. The district is famous for its ancient temples, churches, and mosques. Thrissur Pooram is the most colourful and spectacular temple festival in Kerala. The district was formed on July 1, 1949.EtymologyThe name Thrissur is derived from 'Thiru-Shiva-Perur', which translates to "The city with the name of the Lord Siva". Thrissur was also known as "Vrishabhadripuram" and "Then Kailasam" in ancient days. Another interpretation is 'Tri-shiva-peroor' or the big land with three Shiva temples, which refers to the three places where Lord Shiva resides - namely Vadakkunnathan temple, Asokeswaram Siva temple and Irattachira Siva temple.HistoryFrom ancient times, Thrissur District has played a part in the political history of south India. The early political history of the District is interlinked with that of the Cheras of the Sangam age, who ruled over vast portions of Kerala with their capital at Vanchi. The whole of the present Thrissur District was included in the early Chera Empire. The District can claim to have played a part in fostering the trade relations between Kerala and the outside world in the ancient and medieval period.