Doug,
not sure if I understood it correctly, but check out San Petronio
Basilica in Bologna:
[example of the influence of precession on sundials]
...But considering the example the 66.8m meridian line of San Petronio
Basilica in Bologna which was planned by the famous astronomer Govanni
Domenico Cassini in 1655, the length of shadows at solstics changed.
In summer +2.6cm and in winter -15.9cm. ...
I can check the book for more details if you need, just let me know.
Thomas
I have had the enquiry below from a student and I believe the group's
'international skills' will provide more answers than I can with our
lack of such dials in the British Isles.
In response to my initial reply I received the second courteous
message today, also below.
Regards, Doug
[24 Feb 09] Dear Mr. Bateman
I am an architecture student at studying on astronomical architecture,
Im looking for examples of domes which act as sundials, Unfortunately
there isn't much detail about these kinds of domes in the world, I
wonder if Your honorable could introduce me any resources related to
this topic.
Sincerely yours
Mohammad Vaez,
Bachelor of Arts
Faculty of Fine Arts
University of Tehran
Tel. +98-21-26058691
Email: mv_20...@yahoo.com
[27 Feb 09]
Dear Mr. Bateman
Thank you for replying to my question, The only example I have found
is the Pantheon dome which the sun shines from the hole exactly at the
top on the coffering surface of the dome itself which it is said to be
a sundial, I will be glad to recieve any technical information from an
international expert.
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