The concept dates back to at least 1867.

The concept of a town centre for the area dates back to 1975.

The concept of American football games being played on Thanksgiving Day dates back to 1876, shortly after the game had been invented.

The concept of protecting workers from the perils of labor environments dates all the way back to 14th century Europe.

Despite the improvements over the 841, by the end of the year the chassis, whose concept dated back to 1983, was considered outdated.

Some say that the concept of drinking a small amount of alcohol before a meal dates back to the ancient Egyptians.

This concept dates back almost as far as airplanes themselves.

Although the concept dates back to the 1930s, private speech is still an emerging field in psychology with a vast amount of research opportunities.

The concept for the website dated back to 2000 but it took eight years to find an appropriate producer in Japan.

According to Harry Harding, the concept can date back to 1827.