Carlyle is a mixed residential, commercial, and retail upscale community in Alexandria Virginia. Just west of Old Town and minutes from Washington DC, this metropolitan community offers a dense mix of uses including high-rise residential complexes, high-end office buildings, a luxury hotel, and retail establishments. It is home to the United States Patent & Trademark Office, the National Science Foundation, and the Federal Courthouse. With its distinct architecture and a mix of residences, businesses, and retails, Carlyle District is now considered a new city within a city.