Kraków Prime Meridian line in small park - Great Lines of Earth on Waymarking.com

Text in Polish at the sign placed at the meridian line sais:

HERE RUNS KRAKOW ZERO MERID
19° 57' 21.21" E
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The Cracow Zero Meridian is one of the oldest
prime meridians in Europe and the world, alongside the famous
Greenwich meridian, Paris meridian or Ferro meridian.

Known since at least 1379, used by Nicolaus Copernicus
in his famous work "On the Revolutions of the Heavenly Spheres" from 1543.
Marked out by the Cracow astronomer Jan Sniadecki in 1792,
as a meridian running through the center of the Collegium Sniadecki building;
the first astronomical observatory in Krakow (ul. Kopernika 27).

Meridian, it is a geodetic line connecting the surface of the globe
both poles of the Earth, determining the exact north-south direction;
relative to the prime meridian, in geography, astronomy, and geodesy
longitude is measured - east or west.

Currently, the international zero meridian is the ITRM Meridian

Line type: Historical meridian If other type, please explain.: Prime Meridian Tolerance: 0.1"

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