Centre of Londinium
The stone, which is still situated very near its original position, was at the centre of Londinium, the 3rd century Roman trading settlement as defined by their defensive 'London Wall'.
Originally much larger than its now 0.5m height, the London Stone was referenced in a book belonging to the 10th century King of the West Saxons, Æthelstan and later in the 12th century it was shown as a landmark on maps and referred to as Londenstane .