The Zero Kilometre Stone is a 3 m high limestone sculpture in Budapest, forming a zero sign, with an inscription on its pedestal reading "KM" for kilometres. This stone marks the reference point from which all road distances to Budapest are measured in the country. The reference point had initially been located at the threshold of Buda Royal Palace, but was moved to its present location by Széchenyi Chain Bridge when the crossing was completed in 1849.
The present sculpture is the work of Miklós Borsos and was erected in 1975. The first official monument, a Madonna statue by Eugene Kormendi had been set up at this spot in 1932, but was destroyed in World War II. A second sculpture, depicting a worker, was in place from 1953 until its replacement by the current one.
Wikipedia https://en.wikipedia.org/wiki/Zero_Kilometre_Stone
Official Website http://egyker.blog.hu/tags/Clark_%C3%81d%C3%A1m_t%C3%A9r_fel%C3%BAj%C3%ADt%C3%A1s
Address 1 Lánchíd utca, Budapest 1013, Hungary
Coordinates 47°29'52.408" N 19°2'24.57" E