>Somedays ago, I read e.mail letters about Noon Marks in Cathedrals.
> I live in Bologna (Italy), and the most important Noon Mark is certainly
the Meridian Line of San Petronio Cathedral.
> The first line was traced in 1575 from Egnatio Danti. Eighty years
later, Giandomenico Cassini traced a new and greater line. A general
reconstruction was made in 1776 from Eustachio Zanotti, and this is the
instrument you can see now.
> The height of Gnomon, a hole of diam. 27 mill., is 27.0699 m. The
meridian line is, from the vertical point until the winter solstice, 66.7 m.
>
> But this is not the only Noon Mark in Bologna: in the town there are 13
other horizontal lines like San Petronio.
>1) San Petronio
>2) Palazzo Pietramellara made by astronomer Geminiano Montanari in 1674
>3) San Domenico Church, traced by astronomer Egnatio Danti in 1575
>4) Torre della Specola, traced by astronomer Eustachio Manfredi in 1727
>5) Convento S. Michele in Bosco, by the astronomer Ferdianando Messia in 1788
>6) Palazzo Bianchetti (?), about 1750-1800
>7) Villa Spada (?), about 1750-1800
>8) Baraccano traced by astronomer Sebastiano Canterzani, 1778
>9) Palazzo Agucchi-Bosdari, by astronomer G.Battista Buglielmini, 1787
>10)Parrocchiale di Quarto Superiore, don Domenico Gatti, 1767
>11)Villa Boschi (?) 1850-1900
>12)Collegio Fiamminghi (?), 1750-1800
>13)Villa Celestina, by Adolfo Merlani, 1900 circa
>14)Quartiere "Savena", by Giovanni Paltrinieri, 1988
>
> The latest is a part of a large Sundial having diam. 36m, and a Gnomon
4,5m height.
>
> The town of Bologna and its Province, has about 500 of Noon Marks and
Sundials.
> Last year I wrote a book, with my friend Italo Frizzoni, of 500 pages
about this. The title is:
>PALTRINIERI-FRIZZONI: MERIDIANE E OROLOGI SOLARI DI BOLOGNA E PROVINCIA.
>If you are interested, the price is Lires 120.000 postage included.
>
> My italian explanation about San Petronio Meridian Line, you can find in:
> http://www.mclink.it/mclink/astro/
>
>Do you know Noon marks as "Camera Obscura" (like San Petronio)? If "yes",
please contact me for exchange of informations.
>
>If you want to contact me: [EMAIL PROTECTED]
>
>My address: Giovanni Paltrinieri
> via Giuseppe Dozza n. 3
> 40139 Bologna Italy
> tel. 051/455403
>
>TRANSEUNT ET IMPUTANTUR
>
