The Oak Island mystery is a series of stories and legends concerning buried treasure and unexplained objects found on or near Oak Island in Nova Scotia. Since the 18th century, attempts have been made to find treasure and artifacts. Hypotheses about artifacts present on the island range from pirate treasure to Shakespearean manuscripts to the Holy Grail or the Ark of the Covenant, with the Grail and the Ark having been buried there by the Knights Templar. Various items have surfaced over the years that were found on the island, some of which have since been dated to be hundreds of years old. Although these items can be considered treasure in their own right, no significant main treasure site has ever been found. The site consists of digs by numerous individuals and groups of people. The original shaft, the location of which is unknown today, was dug by early explorers, and is known as "the money pit".