File:Bronze dodecahedron.jpg
Original file (6,000 × 4,000 pixels, file size: 966 KB, MIME type: image/jpeg)
Captions
Summary[edit]
Dodecahedron ( ) | |||||||||||||||||||||
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Photographer |
Eamonn O'Mahony |
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Title |
Dodecahedron |
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Description |
This possibly Gallo-Roman 12-sided bronze object has 12 circular holes of different diameters set within 12 equal pentagons, which are marked by spherical projections of equal size at each corner. Concentric grooves are forged around the holes of each of the 12 faces. Despite such objects being found in the northern provinces of the Roman Empire, there is no mention of them in classical sources and their purpose remains unclear. Several suggestions as to the function of similar dodecahedron have been made. Some believe it to be a gaming piece or die, others claim it as a candle-holder (wax has been found in one example from Germania). Most scholars, however, favour the suggestion that it was used as a measuring device, as an ancient surveying instrument. This theory is supported by the hole in each diametrically opposite face that is proportionally related to the other, although never the same size. It is therefore possible to determine ratios from looking through the holes and aligning sight with a distant object. |
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Date | 6 September 2018, 10:27 | ||||||||||||||||||||
Medium | Bronze | ||||||||||||||||||||
Dimensions | H 4.9 | ||||||||||||||||||||
Collection |
institution QS:P195,Q2659085 |
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Current location |
Collections and Exhibitions |
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Accession number |
HCM 157 |
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Source | Hunt Museum | ||||||||||||||||||||
Permission (Reusing this file) |
Public Domain via Hunt Museum |
Licensing[edit]
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:48, 3 April 2020 | 6,000 × 4,000 (966 KB) | Tori2019 (talk | contribs) | pattypan 19.06 |
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File usage on Commons
The following 2 pages use this file:
- File:Bronze dodecahedron.jpg
- File:HCM 157.jpg (file redirect)
File usage on other wikis
The following other wikis use this file:
- Usage on af.wikipedia.org
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- Usage on pl.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title |
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Camera manufacturer | NIKON CORPORATION |
Camera model | NIKON D5300 |
Copyright holder |
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Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/22 |
ISO speed rating | 100 |
Date and time of data generation | 10:27, 6 September 2018 |
Lens focal length | 85 mm |
Short title |
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Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Capture One 9 Macintosh |
File change date and time | 10:27, 6 September 2018 |
Exposure Program | Manual |
Exif version | 2.2 |
Date and time of digitizing | 10:27, 6 September 2018 |
APEX shutter speed | 5.9068905902692 |
APEX aperture | 8.9188632369872 |
APEX exposure bias | 0 |
Maximum land aperture | 3.5 APEX (f/3.36) |
Metering mode | Spot |
Light source | Flash |
Flash | Flash did not fire |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Exposure mode | Manual exposure |
White balance | Manual white balance |
Focal length in 35 mm film | 127 mm |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.3.0.0 |
Serial number of camera | 4974622 |
Lens used | 85.0 mm f/2.8 |
Keywords |
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IIM version | 4 |