A cover bed is a decorative bed somewhat similar to a four-poster bed. A typical canopy bed often features posts at each of the four corners extending four ft high or more above the mattress. Ornate or ornamental fabric is usually draped across the upper area between the posts and a stable swath of cloth might create a ceiling, or canopy instantly over the bed.
A four-poster bed is a bed with four vertical columns, one in each corner, that help a tester, or upper (often rectangular) panel. This tester or panel will often have rails to permit curtains to be pulled around the bed. There are a selection of vintage four-poster beds extant relationship to the sixteenth century and earlier; many of those early beds are extremely ornate and are made from oak. An example of such an early sixteenth-century four-poster resides in Crathes Fortress, which was made for the original fortress house owners in the Burnett of Leys family.