For simplicity countries are based on present day borders but with additional data to focus the search:
The century of inception or greatest usage.
Period uses the Architectural movement of the country of origin. Hence Italian Baroque commenced after the Council of Trent in 1545, North German Baroque started after the Thirty Years War in 1648.
Style is “in the manner of” which can also mean in the manner of making of a period – or – in the manner/style of an artisan.
There are numerous invented and conflicting vernacular names for frames, for example “Dutch Ripple Frames” is a mid 20th Century invention to describe frames covered in ripple mouldings. The frames described are actually of Mid European manufacture. Dutch frames usually do not have ripple decoration – and if used, rarely have more than one band. Academic names are more accurate by referencing the style of a specific designer, craftsman, place, shape or Latin name etc. For example Carlo Marratta, Chippendale, Herrera, architrave, ogee etc.
In the interest of a “universal” frame search both Vernacular and Academic names are given.
A basic description of substance and surface