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 head office of the Tamilnad Bank is at Thoothukudi, Tamil Nadu. The primary objective of founding TMB was to serve the Nadar business community, and the idea was proposed at the annual meeting of Nadar Mahajani Sangam at Tuticorin in 1920. Outside the state of Tamil Nadu, the bank opened its first Indian branch at Bangalore in 1976. On 9 December 1984, the bank opened its first fully computerized branch at WGC Road, Tuticorin. On 11 November 2003, the Bank launched its ATM Card. In e-banking, RTGS/NEFT facilities have been successfully implemented by the TMB bank. The Tamilnad Mercantile Bank had the tie-up with Western Union Money Transfer to facilitate the remittances from abroad to India. For providing payment gateway services to the internet banking customers, TMB bank collaborated with BillDesk (India ideas.com), CCAvenue (Avenues India), SBI ePay, Atom Technologies and PayU India. It was the first old bank to supplying POS machines and introduce mobile banking to Customers. The bank had adopted a video conferencing facility for connecting with the Head Office, various Departments, and Regional offices. For its ATM operations, TMB bank is a member of National Financial Switch. The bank also introduced TMB e-passbook app as a part of its mobile banking operation.