A cover bed is an ornamental bed considerably similar to a 4-poster bed. A typical canopy bed often features posts at each of the 4 corners extending 4 feet high or more above the mattress. Ornate or ornamental cloth is commonly draped throughout the higher house between the posts and a strong swath of material could create a ceiling, or canopy immediately over the bed.
A 4-poster bed is a bed with 4 vertical columns, one in each corner, that help a tester, or higher (often rectangular) panel. This tester or panel will typically have rails to permit curtains to be pulled around the bed. There are a selection of antique 4-poster beds extant dating to the 16th century and earlier; many of those early beds are highly ornate and are comprised of oak. An example of such an early 16th-century 4-poster resides in Crathes Fort, which was made for the original citadel homeowners within the Burnett of Leys family.