The
Milion ( or ,
Míllion; ) was a monument erected in the early 4th century AD in
Constantinople (modern-day
Istanbul,
Turkey). It was the Byzantine zero-mile marker, the starting-place for the measurement of distances for all the
roads leading to the cities of the
Byzantine Empire. It thus served the same function as the
Golden Milestone () in
Rome's
forum. The domed building of the Milion rested on four large arches, and it was expanded and decorated with several statues and paintings. It survived the
Ottoman conquest of Constantinople in 1453 but had disappeared by the start of the 16th century. During excavations in the 1960s, some partial fragments of it were discovered under houses in the area.