In American colonial architecture and design, the First Period was the time period of approximately 1626 through 1725. There are more houses constructed by America's earliest settlers in Essex County, Massachusetts than anywhere else in the country. First Period's successor is the Colonial Georgian Period.
Among other characteristics, First Period houses have a steeply pitched roof, a slightly asymmetrical plan, and a central chimney. The First Period house is distinguished from later houses by its exposed (often decorated or chamfered) frame in the interior. Some early windows in modest houses may have had no glazing, but the standard First Period window, until at least 1700, was the diamond-paned casement. No example of this type of window survives in situ; all current examples date to (at the very earliest) the late 19th century. Multiple-light, sliding sash windows started to appear around 1700, and by about 1750 had supplanted the earlier type.
- Salem Massachusetts First Period – gives a description of this period as well as others
- Essex National Heritage Area list of first period houses