The Kos Minars are medieval milestones that were made by the Afghan Ruler Sher Shah Suri and later on by Mughal emperors. These Minars were erected by the Mughal Emperors on the main highways across the empire to mark the distance. The Kos Minar is a solid round pillar,around 30 feet in height that stands on a masonry platform built with bricks and plastered over with lime.
Though not architecturally very impressive they were an important part of communication and travel in a large empire. Kos Minars were used to mark the royal route from Agra to Ajmer via Jaipur in the west, from Agra to Lahore via Delhi in the north and from Agra to Mandu via Shivpuri in the south. Modern Indian highways have come up along roughly the same routes as those marked by these minars.
Over the years these road monuments have gone into a state of disrepair and are almost lost in obscurity. Along India’s old highways, particularly the Grand Trunk Road, one still finds Kos Minar.
According to a report of the Archeology Survey of India, there are 49 Kos Minars in Haryana. There are also five kos minars around Ludhiana city. Of late some of these Minars have been restored and attempts for preserving many others are online.
There is a preserved Kos Minar in Lahore, near the tomb of Ali Mardan Khan. It probably lined the original G.T. Road, a few hundred meters north of it.