Listed on the National Register of Historic Places, the Octagon House is one of the most unique buildings in Danbury. The three-story, eight-sided home was built by a man named Daniel Starr around 1852. It is perhaps the best example of an octagon house in Connecticut, featuring porches and a cupola at the top. Inside, there is a center spiral staircase. At some point, it was converted into apartments. This arrangement continued for some time but the house fell into disrepair. A local architect firm acquired it in July 2016; it is not clear what its status is today.