Central-passage house

[1][2] It partially developed as greater economic security and developing social conventions transformed the reality of the American landscape, but it was also heavily influenced by its formal architectural relatives, the Palladian and Georgian styles with their emphasis on symmetry.

[4] The single-pile eventually gave way to two-room-deep, or double-pile types and a more gentle-sloping roof with dormer windows by the end of the 18th century.

Also, the earliest examples display some asymmetry, but this was quickly superseded by a strictly symmetrical facade.

[2] Stylistic elements that were typical of the type were massive bookend chimneys with rectangular caps, flat or segmented arches over door and window openings, and a raised, often molded brick, water table.

Diapering (diagonal diamond patterns done with darker brick) was also common on gable ends.