Characteristics of modern day folding tables and chairs originated in the medieval times, a period from the fall of the last Roman Emperor, in 476 AD, to the fall of Constantinople, in 1453.
Furniture makers deliberately built tables and chairs that could easily be disassembled and transported. So when harsh fighting erupted between nations, lords and neighbors, families could grab their belongings and flee in a moment's notice. Most of the tables of this era collapsed rather than unfolded.
Bed and Board
Interestingly, the expression "bed and board " was coined in the Medieval era with the latter "board" referring to the main table used for dining. The "board" was just that - a portable trestle table that could easily be packed away when not in use and transported with ease. Folding chairs were popular amongst the medieval aristocracy, since again they could be easily folded and carried when on the move. Styles were simple and practical. They were usually made of oak or other woods.
Folding tables have evolved through the centuries with the emergence of new technologies and designs. Today's table top options range from wood, particle board and melamine, laminates, aluminum, plastic, and so forth. Table legs can be built with steel, aluminum, other metals and plastic. So while the main use of folding tables has changed throughout history, the purpose remains the same - collapsible, easily storable, portable, and lightweight.