company, while the Corporation looks after the removal and processing of solid waste in the others, with a superintendent engineer managing the channels. , eight transfer stations exist within the city for treating the waste. Garbage is dumped in two dump-yards in the city—One in Kodungaiyur and another in Pallikaranai, with a major portion of the latter covering the Pallikaranai marshland. In market areas, the conservancy work is done during the night. Electricity is distributed by the Tamil Nadu Electricity Board. Fire services are handled by the Tamil Nadu Fire and Rescue Services. The city, along with the suburbs, has 33 operating fire stations. The Chennai City region has 568 post offices, of which nearly 460 operate from rented premises. Architecture With the history of many neighbourhoods of the city such as Mylapore, Triplicane, and Tiruvanmiyur antedating that of the city itself, the architecture of Chennai ranges in a wide chronology. The oldest buildings in the city date from the 7th and 8th centuries CE, which include the Kapaleeshwarar Temple in Mylapore and the Parthasarathy Temple in Triplicane, built in the Dravidian architecture. This architecture includes various styles, such as those of the Pallavas, the Cholas, and the Vijayanagara empires. The associated Agraharam architecture, which consists of traditional row houses surrounding a temple, can still be seen in these areas. The heritage temples at Mamallapuram at the outskirts of the city are some of the examples of the Pallava architecture. Chennai ranks second to Kolkata in having the largest collection of Indian heritage buildings in the country. With the advent of the Mugals and the British, the city saw a rise in a blend of Hindu, Islamic and Gothic revival styles, resulting in the distinct Indo-Saracenic architecture. The architecture for several early institutions such as banking and commerce, railways, press and education, chiefly through the colonial rule, followed the earlier directions of the Neo-Classical and the Indo-Saracenic. The Chepauk Palace in the city, designed by Paul Benfield, is said to be the first Indo-Saracenic building in India. Since then, many of the colonial-era buildings in the city were designed in this style of architecture, which is most apparent around the Fort St. George built in 1640. Most of these were designed by English architects Robert Fellowes Chisholm and Henry Irwin. The best examples of this style include the Madras High Court (built in 1892), Southern Railway headquarters, Ripon Building, Government