It is a small city with an area of 26.50 km2. The rapid growth and expansion of Sylhet occurred during the colonial period. Sylhet Municipality was established in 1878. A devastating earthquake demolished almost the entire town on 12 June 1897 following which a modern and European model new town was built on the wreckage. Many new roads were constructed in the late 1890s and Sylhet became really connected to the other parts of the country with the establishment of an extension line of Assam Bengal Railway in 1912–15. From the beginning of the 20th century, the importance of Sylhet increased with the establishment of the tea industry. In the 1950s and 1960s, rapid urbanisation took place in the town, fostered by the expatriate Sylhetis and the process is still ongoing.