Astronomical observatory of Nice.

Great equatorial built in 1887 by Charles Garnier for the basis and Gustave Eiffel for the cupola, to host a 18-meter long refracting telescope 🔭, the longest in the world at the time.

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Astronomical observatory of Nice.

Meridian sight for North-South alignment of the refractor 🔭 hosted in the great meridian, used to chart the brightest stars in the sky.

#cotedazur #nicefrance #nicecotedazur #science #astronomy #astronomicalobservatory #alignment #calibration #accuracy #stone #stonemonument