The twin cities of Kalyan and Dombivli were joined and converted into the Kalyan-Dombivli municipal corporation in 1982 to improve the administration of the twin townships. The headquarter of this city is situated in Kalyan. Kalyan and Dombivli are both cities in the Thane District of Konkan division in Maharashtra state. The city comprises a majority of Hindu residents who speak mostly in Marathi. The weather in this city follows the exact trends as that of Mumbai and is known to experience the notorious Mumbai rains. The twin city of Kalyan-Dombivli had been under the reigns of the Mughal, the Portuguese as well as the British. The celebrated Maratha heroes, held in high esteem by the residents, were the only valiant defense against these foreign invasions. The city of Kalyan used to be surrounded by a fort wall which was constructed during the Mughal age and further improved by the Maratha rulers. It was called the Durgadi Fort. History claims that a small wooden temple dedicated to Durgadevi was behind the mosque inside this fort wall. However, this historical relic was dismantled by the British and the stones were used to build the piers of Thane and Kalyan. The idol in the temple was also stolen. Only the remnants of the north-west gate of this fort still remain to remind the people of the historic past.
The government owns 63.44% of the share capital of Union Bank of India making it one of the largest government-owned bank. As on 30 September 2015, the Union Bank had a network of 6909 ATMs. The online telebanking facility of UBI is available to all the Core Banking Customers, either individual or corporate. UBI had 4214 branches, as of September 2016. Out of them, four bank branches are outside India in Hong Kong, Antwerp, and Sydney (Australia) Dubai International Financial Centre. The representative offices of UBI are at Abu Dhabi, Shanghai, Beijing. The Union Bank of India (Union Bank) was registered as a limited company in Mumbai on 11 November 1919, and Mahatma Gandhi inaugrated it. The Union Bank of India had only four branches - three in Mumbai and one in Saurashtra at the time of Independence in 1947. After Independence, the growth of UBI was accelerated, and the Indian Government nationalized it in 1969. It had 240 branches by that time. The Union Bank of India acquired Belgaum Bank shortly after nationalization. The UBI bought the Miraj State Bank in 1985. In 1999 the Union Bank was requested by the RBI to acquire Sikkim Bank in a rescue after extensive irregularities had been discovered at the non-scheduled bank.