The valley has been used by human use since the Neolithic period, according to the various archeological finds in the area.

It has been used a great deal since the Classical period (from the middle of the 18th century onwards).

The interior is a fairly level plateau and has been used as farmland since the medieval period.

There is evidence that humans have used pokers since the paleolithic period.

The technique has been used since the Egyptian period.

The word curry, meaning 'gravy', has been used since the medieval period.

Humans have used the site since the lower Paleolithic period.

"Georgia" is an exonym, used in the West since the medieval period.

All the ingredients for iron-making exist and have been used since the Roman period.

The term has been used since the early period of Joseon dynasty.