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File:Porro - LA PLUS GRANDE LUNETTE DU MONDE.jpg

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Description 52 cm diameter refractor in Parc Astronomique, both created by Ignazio Porro
Source Tarif raisonné des produits de l’Institut Technomatique. 1857 (ref. Merz Telescopes: A global heritage worth preserving, P. Brenni, p. 14)
Author Ingnatio Porro (1801-1875)
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The author died in 1875, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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current19:14, 2 January 2023Thumbnail for version as of 19:14, 2 January 20232,716 × 2,435 (1.19 MB)Fabian RRRR (talk | contribs){{Information |Description=52 cm diameter refractor in Parc Astronomique, both created by Ignazio Porro |Source=''Tarif raisonné des produits de l’Institut Technomatique. 1857'' (ref. Merz Telescopes: A global heritage worth preserving, P. Brenni, p. 14) |Date= |Author= Ingnatio Porro (1801-1875) |Permission={{PD-old-expired|1875}} |other_versions= }}

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