Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Arizona

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Tempe Arizona USA Horizontal Dial 23
A horizontal dial from Picture Rock Sandstone with 24k gold-plated inlaid brass fittings, 25 inches wide by 36 inches long, with gnomon 12.5 inches high. Gnomon is 1.5 inches thick. Total sundial weight 110 lbs. Time is marked in 10 minute intervals. Has Equation of Time and moonlight reading time correction table. Has the time and direction of sunrises and sunsets, the solstices, equinoxes, solar azimuth, and high noon.
Tempe Arizona USA Equatorial Dial 75
An equatorial dial designed by R. Newton Mayall with a "curved triangular gnomon over a curved face approximately 1ft. wide. Tells the day of the year and standard time noon." Has a plaque explaining the Equation of Time.
Tenango de Doria Hidalgo Mexico Vertical Reclining Dial 459
A very striking vertical reclining dial 85 x 115 cm created from hand painted tiles, each individually fired in a kiln and assembled at Tenango de Doria by David Canyedo. In addition to hour lines, the dial includes declination lines for the solstices and equinox. The dial includes constellation maps of both the northern and southern hemispheres, a celestial sphere, and rose of winds (compass). The artistry also includes NAHUI OLLIN (the fifth sun which is the era we are living in according to the Aztecs). The dial has an equation of time that allows conversion from local solar time to standard time. The dial was designed to arouse interest of high school students in astronomy.
Terre Haute Indiana USA Calendrical Dial 586
Via Solaris, a 20x15x4 foot granite, stainless steel and bronze calendrical dial showing yearly equinoxes and summer solstice.
Terre Haute Indiana USA Horizontal Dial 685
A round bronze horizontal dial with 6 AM to 6 PM hour lines and half-hour lines and Arabic hour numerals. Eight perimeter points and the one central decorative point may represent alignments but no explanation is given. Dial sits on a carved stone column. Base marked 1920 1921 1922 1923.
Thunder Bay Ontario Canada Analemmatic Dial 466
A very well constructed analemmatic dial about 24 by 11 feet. The dial may be difficult to find, since it is in the center of a field that is devoted to wild grass of the area. Cement markers are used to show the hours and for the central base showing the months where to stand. The hourly markers are corrected for the longitude of Thunder Bay. The site is visited quite frequently by school children and is a great educational tool for dialing.
Toddsbury Virginia USA Horizontal Dial 69
Toledo Ohio USA Equatorial Dial 621
An equatorial projection dial 18 inches wide atop a 3 foot high fluted steel column. Located on the Anthony Wayne Trail Bridge inside the zoo near its entrance, access requires zoo admission. Dial sits atop a three foot high fluted steel column.
Toms River New Jersey USA Horizontal Dial 507
A horizontal dial about 22 feet in diameter. The dial base is stone and gravel outlined in shore juniper plants. Treated lumber, now gray through weathering, is used for the both the hour lines and the marking Roman numeral hours. Nicely fashioned with a hub of green junipers in the center surrounding a simple wood gnomon. Builder Richard Perez started off just wanting something a little different?and the sundial emerged in 1992 as the main theme of landscaping.
Toronto Ontario Canada Horizontal Dial 596
A 210 cm diameter horizontal dial of blue granite with a 56 cm high stainless steel gnomon. In addition to showing local time, the declination line that touches the base of the gnomon traces the path of the shadow on June 23 (date of the 1985 Air India terrorist-bomb air crash) and also marks solar noon at the crash site near Akahista, Ireland where there is a similar memorial sundial. Stones forming the pedestal represent all of the Provinces and territories of Canada, and the countries of India, Ireland, Japan and the United States of America.
Toronto Ontario Canada Equatorial Dial 364
The face of this equatorial dial is an arc of a sphere 2 meters in diameter. A nodus on the polar gnomon casts a shadow indicating solar declination. Aligned with the dial is a 15 meter meridian line which passes through the site of the transit instrument of the former Toronto Observatory.
Toronto Ontario Canada Horizontal Dial 128
Approx 55 ft square Stone (concrete?) 4AM-8PM marked in Arabic numerals, half and quarter hours marked with lines. A huge dial. The gnomon is sunk below the outer level by a series of steps. The hours are marked by stone slab 'seats' spaced around the outer square. There are two seats at the noon position to allow for the width of the gnomon. This dial may have been destroyed by now in a rebuilding project.
Toronto Ontario Canada Armillary Dial 413
Armillary dial about 4 foot in diameter. Gnomon rod appears to be missing. Raised Roman numbers show the hours from V in the morning to VII at night. Equatorial strip is about 6 inches wide.
Toronto Ontario Canada Equatorial Dial 414
An equatorial dial with rod gnomon bent into a half analemma. Raised Roman numerals along the equatorial arc from V in morning to VII at night. Gnomon held by semi-circular arc with pleasing proportions that match the equatorial arc.
Toronto Ontario Canada Horizontal Dial 433
A striking 30 inch diameter horizontal dial. The equation of time correction is made by a slight rocking of the gnomon about the polar axis, controlled by a manual date index and a hidden cam mechanism. At the south end of the gnomon on the dial is a sunburst design. The octagonal pedestal is ornately covered with six copper plates. Each showing two zodiac signs in relief, forming a frieze 20 inches high around the pedestal.
Toronto Ontario Canada Horizontal Dial 435
A small bronze 8 inch diameter horizontal dial, sitting upon a granite column of equal diameter. The dial plate has simple radiating hour lines and Roman numerals. No minute or quarter hour marks. The gnomon may have broken off at some time and been repaired, since it is now held on by a rather unsightly bronze angle iron.
Torre Coahuila Mexico Analemmatic Dial 509
An analemmatic dial with major axis of 18 feet built of many different types of stone from the Torre?n Jard?n area, including white and red marble, travertine, yellow and black flagstone, and limestone. Insets of gray stone hold the hour markers from 5am to 7pm. The finished dial has been set in desert plants, native to the region, including: Candelilla, Gobernadora, Lechuguilla, Sangre de drago, Huevo de toro, Biznaga, Pitaya, Corona de espinas, Nopal rastrero, and Cardenche. These are all protected desert species. The dial has a compass rose and six disk-shaped maps at the east and west sides to show the course of sunrise/sunset across the Mexican Republic on the solstices and equinox.
Torreon Coahuila Mexico Vertical Dial 487
This is a stone cube 3.5 m high with four vertical dials. Each dial face is about 2.2 m high by 1.25 m wide The South and North faces have Arabic numerals to indicate solar time from 6am to 18hrs, with marks every 15 minutes. The East face has numerals from 6am to 12pm and the West face complements from 12pm to 18hrs. These faces have half hour marks. The South face has seven declination lines, constellation dates, analemma line, zodiac symbols, and equinoctial and solstice lines. A curve to indicate light and shadow hours all the year is on each face. A square base on quarry. At the north-east corner are the carved names of the designer Miguel Bertran de Quintana and builder Cirilo Nunez. Note: because of the sundial size and latitude, it was necessary to extend the four vertical faces of the sundial into the horizontal plane to indicate the summer solstice line and 11:30 and noon hours of summer.
Towson Maryland USA Horizontal Dial 334
A bronze horizontal dial made inscribed "1715". About 10 inches in diameter with an ornately decorated dial plate. The original gnomon has been removed and a modern garden sundial placed over the original dial face; little of the original face is visible. The dial is on a square stone that sits atop a plane square cut stone pillar.
Traverse City Michigan USA Analemmatic Dial 494
This beautiful analemmatic dial was built as part of the American Society of Landscape Architects' 100 years/100 Parks project. A colored concrete pad was poured on the north/south axis and scored joints for each month. Stainless steel plates show the name of the months. On either side of the concrete pad are dry laid flagstones with creeping thyme in the joints. Hour markers are 12 inch diameter colored concrete bases with numbers cut from stainless steel. A stained glass sun plaque at the top of the month axis was made by a local artisan. Total dial size is about 10 x 20 feet.