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In 1869, the General Assembly of Connecticut granted the Town of Norwich and the County of New London the right to jointly erect a multipurpose building for town, city and county purposes, which originally included a county Superior Court and a jail in the basement. The Second Empire-style City Hall of Norwich, at the intersection of Union Street and Broadway, was built between 1870 and 1873. The clock tower was added in 1909 and a European plaza in 1999. There is also HABS documentation for this building from 1984.