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Astronomical meridian line traced in 1905 by D. Luis Ceballos Medrano in the Lonja of the Royal Monastery, used to determine the geographical orientation of the Royal Site of El Escorial.




Astronomical meridian line traced in 1905 by D. Luis Ceballos Medrano in the Lonja of the Royal Monastery, used to determine the geographical orientation of the Royal Site of El Escorial.