The district's architecture typifies the city's development between about 1880 and 1930; it was listed on the National Register of Historic Places in 1983.

[1] Within the district are the former Sport and Medical Science Academy building (a non-contributing property), and the Central Fire Station of the Hartford Fire Department.

The district includes location of the Hartford Steam Company generating plant.

[2] Other contributing properties in the district include St. Patrick - St. Anthony Roman Catholic Church (built in 1849), the Masonic Temple (built in 1894) and the Hotel Lenox (also known as Hartford Hotel), a Beaux-Arts eclectic style building at 280-294 Ann Street, built in 1899.

Another property that shows evidence of the rise of the automobile in importance is 316-320 Ann Uccello Street, which was built for a maker of electrical equipment for automobiles.