The Cata mine is one of the early mines, and a city neighborhood is named after it.

Traces of tanks and aqueducts can be found at many other early Roman mines.

The early mines were laid up in the 1790s.

The earliest mines were usually of this type.

This was a very early mine, and evidence shows it may have started in the 17th century: it closed in 1885.

The TM-44 is similar to the earlier mine, weighing more with a larger charge.

The earliest mines were the "torpedos" associated with harbor defenses.

The early mines began to give out in 1769.

Portions of the earlier mine may be enveloped by the later broader gallery.

It was also one of the earlier mines to use rubber tyred mining equipment on a large scale.