Sundials - World's Oldest Clocks

North American Sundial Society

Sundials of North America

This is a complete listing of sundials in the North American Sundial Society Registry. Click on any dial thumbnail picture or city name to display the full dial listing and images. To see sundials from a particular state or province, you may click on the list at right to see all registered sundials in that state, province or country (at bottom) displayed in city order.

You may also type into the NASS search field at upper right any search word such as "equatorial" to get a list of all articles mentioning equatorial dials and a list of all equatorial sundials in the registry. (Try other dial types: "vertical", "horizontal", etc).

 
 
Arvada Colorado USA Horizontal Dial Dial 22
A large horizontal dial of brick and stone with a formed structural steel gnomon in the form of a modern sculpture. Roman numeral hour marks doe DST are on raised brick pillars.
 
 
Colma California USA Horizontal Dial 21
This large ground-level horizontal dial is 40 ft. diameter. Formerly a floral dial with a cypress tree as gnomon and hour lines crafted out of plants such as santilina shrubs. During the 1960's the dial was changed to concrete and aluminum. Now approaching 2020, the concrete dial has a brick surround. Time is marked by large Roman numerals and hour lines in an interior chapter ring. The gnomon is a supported beam with a graceful shaped tip. It may be aluminum, but shows signs of weathering.
 
 
San Francisco California USA Vertical Dial Dial 20
Known as the "Navigators' Dial", this sundial is dedicated to three early explorers of the California coast. The dial itself is a sliced bronze globe of the earth sitting on the back of a tortoise. Overall, the globe hemisphere is about 2 1/2 feet in diameter, showing the world in relief centered on California. The flat face of the hemisphere is a beautiful vertical reclining dial. The dial sits atop a stone column.
 
 
San Diego California USA Vertical Dial Dial 19
Above the southwest entrance of the Chemistry-Geology Building is a vertical declining dial built by Richard L. Threet in 1979. The dial uses thin aluminum tubing as a gnomon to cast shadows on a ring of hour and half hour lines approximately 9 feet in diameter. The lines were originally painted black on the white concrete wall with only the 9 am, 12 noon, 3 pm and 6 pm lines boldly numbered. Since then the dial has lost all but the 12.
 
 
Riverside California USA Equatorial Dial Dial 18
An equatorial dial 47 inches in diameter made of stainless steel. It sits upon four sleek pillars setting on a concrete rise. The gnomon rod has a round disk with a hole to act as a nodus. The dial equatorial band has solstice and equinox lines, as well as a line showing the declination of the sun marked with by months and zodiac signs. Hour lines are marked by raised stainless steel Roman Numerals. Dial is corrected to Pacific Standard Time.
 
 
Berkeley California USA Horizontal Dial Dial 16
A 16 inch diameter horizontal dial made of bronze. Gnomon is 8 in. long, 5 in. high. A classic horizontal dial on a 4 foot marble pedestal. Donated in 1915 by Class of 1877. Includes EOT table by date. The dial sits atop a marble pedestal.
 
 
Tucson Arizona USA Horizontal Dial Dial 14
A 25 inch circular engraved horizontal dial in a large irregular stone. Surrounding the dial on the stone are zodiacal signs and a beautiful engraved drawing of the surrounding mountains. The designer, John Carmichael, calls these dials "horizontal string heliochronometers" since the gnomon is a brass cable held very straight under tension from a heavy counterweight which is suspended from a brass hinged lever.
 
 
Tucson Arizona USA Horizontal Dial Dial 12
This concrete and adobe brick horizontal dial is approximately 8 1/2 feet in diameter with a triangular gnomon 25 x 32 inches. This is a large, but very plain sundial except for the shiny chrome plated gnomon. It lacks numerals, but has hour points and shows the cardinal points. The dial is corrected for longitude. The pedestal is missing some bricks and is adorned with graffiti.
 
 
Tucson Arizona USA Sun Alignment Dial 11
A "Stonehenge" or sun circle dial designed by Chris Tanz, Susan Holman, Paul Edwards and with the help of Will Grundy and sponsored by the Pima County Flood Control and Transportation Dept. The structure uses a broken circle of walls to create designs made of light based on the movement of the sun. The circle, 50 feet in diameter with 8 foot walls is modeled loosely on the Casa Rinconada kiva ruins in Chaco Canyon, N.M. The walls are of integrally colored concrete block, concrete, and flagstone. Lines on a bronze plaque indicate north and south and the direction of sunrise and sunset on the equinoxes and solstices. Holes in the wall do the same. Solar noon is marked when sunlight comes through a slot in the South wall and passes a line on the floor.
 
 
Ottawa Ontario Canada Horizontal Dial Dial 10
A bronze 12 inch diameter horizontal dial with hour lines from 4 AM to 8 PM and engraved Roman hour numerals and compass rose. This restoration was donated by Thomas Ritchie who remembered from his youth that the original dial was accidentally destroyed during the construction of the Parliament Library in 1872. The restored dial was unveiled May 19, 1921 by the Governor General, Sir Victor Cavendish, Duke of Devonshire.Dial sits atop light granite pillar approximately 18 inches diameter and 40 inches high.
 
 
Sun City Arizona USA Horizontal Dial Dial 8
A monumental horizontal dial in a gravel rock garden. Gnomon is 22 feet high, 40 feet long built from a structural steel "I" beam 64 feet long. Gnomon is supported by three concrete triangular legs and is encased in concrete with four shadow-casting style edges. A circular concrete walkway under the gnomon has painted Roman numeral hour markers. This dial had significantly deteriorated and was in danger of demolition in 2011 when rescued by the efforts of Sun City residents, numerous Sundial Mail List letters explaining its significance and, particularly, an advocacy letter by NASS member Roger Bailey. NASS member John Carmichael was instrumental in coordinating these efforts, which led to complete restoration and re-dedication in October, 2011. The dial was a center piece of the innovative Sun City planned community, built in the early 1970's by visionary developer John Meeker.
 
 
Phoenix Arizona USA Horizontal Dial Dial 7
This large ground-level horizontal dial designed by Charles Keener. Dial is a circular concrete slab 62 in. diameter and 8 in. thick. The gnomon is 30 in. high, 41 in. substile, 55 in. stile. Dial has Roman numerals. Unfortunately, the 6AM and 8AM numerals are missing. Ground level dial composed of concrete slab 62 inch diameter and 8 inch thick.
 
 
Westbury New York USA Polyhedral Dial Dial 5
An old polyhedral dial set atop a tall stone column on the grounds of Old Westbury Gardens. Old Westbury Gardens is the former estate of John Shaffer Phipps, heir to a U.S. Steel fortune. Built in 1906, this garden is an example of period landscape design, with formal gardens and landscaped grounds on a 200 acre site. The gardens and mansion are open to the public but there is an admission fee. It is reported there are other sundials within the grounds.
 
 
Tucson Arizona USA Equatorial Dial Dial 4
A bronze equatorial dial approximately 2 ft. in diameter designed by R. Newton Mayall. Mayall stated, "When I was asked to design the sundial in front of the Museum at Kitt Peak I was more than pleased, for it gave me a chance to work a semblance of astronomy into it. The design reflects the great telescope nearby, with its base and fork type mounting, the dial itself being the "telescope"." The dial surface is a half-cylinder whose inner surface has seven date lines and 15 minute apparent solar timelines. A thin rod supports a 1/4 inch spherical nodus in the middle of the sundial directly above the point where the 12 noon line crosses the equinox line. The shadow of the nodus tells both the apparent solar time and the date. The dial is in fair condition, with the brass gnomon rod and nodus sagging, giving rise to a noticeable error in time and date readings. There is a separate plaque in front of the dial that gives instructions for obtaining standard time using a table of the Equation of Time corrected for the dial longitude.
 
 
Flagstaff Arizona USA Horizontal Dial Dial 2
Small bronze horizontal dial with a coarse chapter ring and Roman hour numerals. The gnomon is done as a gryphin. It was a gift from the observatory staff to Dr. Lowell. In a thank you note to his staff, Lowell stated, "Nothing could have pleased me more than that Sundial clothed with its mountain cloak, symbolic of when the sun always shines. It shall be inscribed with all your names and set up on the top of Mars Hill." The original square stone base is replaced by an irregular column of stone and concrete. The square plinth at top still supports the small horizontal dial.
 
 
Carefree Arizona USA Horizontal Dial 1
A 90 ft. diameter horizontal dial with a large reflecting pool beneath the gnomon designed by John Yellott. The hour markers are 4 ft. diameter concrete circles. The dial is designed to show solar time corrected for the time zone offset. Thus the hour markers have been moved ahead of the solar time position. The hour lines are separated by alternating dark and light colored stones. The gnomon itself is 4 ft. wide, 62 ft. long and the tip is 35 ft. high. A pilot dial at a scale of 1/4 in. =1ft. is at the South end of the large dial. It is constructed of gold-anodized aluminum with time lines at 10 minute intervals. An equation of time plaque is nearby. The upper surface of the dial formerly served as a solar water heater to provide hot water to the city's first office building. Numerals face outward, so that they are more easily read by viewers.
 
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