NBT Bank Information NBT Bank has roots as old as 1856 when several Norwich-area business leaders decided to form a bank to manage the financial needs of themselves and the various area residents. In their over 160 years as a business, they have built a variety of relationships with multiple Norwich-area financial institutions and with international banking groups around the world. They have also created a multitude of online banking options that are designed to handle a variety of different needs. If you are interested you can download the NBT Bank History here: NBT Bank: A History of Growth ...