Bay windows became a hugely popular feature of residential Victorian architecture in the British Isles from about the 1870s and hold a continuous appeal up to this day. They are used to increase the flow of natural light into a building, thereby also making a room appear larger, and to provide views of the outside which would be unavailable with an ordinary flat window. Based on British models, their use spread to other English speaking countries like the USA, Canada and Australia. This example is at 16 Leyden Street in Plymouth, Massachusetts in an area with sea captain houses. Faber-Castell Pitt art pens in a Stillman and Birn sketchbook.