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Zero Mile Stone is a monument locating the geographical center of colonial India in the city of Nagpur, Maharashtra. The Zero Mile Stone was erected by the British who used this point to measure all the distances. The Zero Mile Stone consists of four horses and a pillar made up of sandstone

The British rulers considered Nagpur to be the centre of India and hence identified this point and constructed the Zero Mile Stone.

source: https://en.wikipedia.org/wiki/Zero_Mile

image source: http://tariquesani.net/coppermine/displayimage.php?album=23&pos=21