777 Main Street (Hartford, Connecticut)

777 Main Street (formerly known as the Hartford National Bank and Trust Building) is a residential skyscraper in Downtown Hartford, Connecticut. Built in 1967, it is a prominent local example of Mid-Century Modern architecture, designed by Welton Becket. It was listed on the National Register of Historic Places in 2014, and was converted to residential use. The building is LEED Platinum certified by the U.S. Green Building Council, and is Connecticut's first microgrid. Clean, combustion-free renewable energy to power and heat the building is created on-site from 336 Rooftop Solar panels and a 400 kilowatt fuel cell. These clean energy sources also power the 31 electric charging stations in the building's garage, helping to bolster clean commuting.