Also called the St. Clement's Cross or Mariner's Cross. To many Christians, the nautical image of an anchor gives the idea of navigation (through life). The cross is called St. Clement's Cross and Clement became the patron saint of anchor smiths, blacksmith mariners, marble workers and stone cutters.
Clement was considered a renegade and ever since, the Anchor Cross has been used by Christians who do not wish to conform to the state religion. When Christians have been persecuted and forced underground, their emblem has often been the Anchor Cross. To the outside world, it was just an anchor. To the Christians, it was a camouflaged Latin Cross. Like a ship's anchors, it helped them to keep their faith firm in the stormy social and religious environment.