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 our complete listing and images. To see sundials in a particular state or province, you may click on the list at left to see all registered sundials in that state, province or country (at bottom) displayed in city order.

Cuencame Durango Mexico Vertical Dial 489
This vertical dial is 2m tall by 1.2 m wide and sits atop a quarried column nearly 7 m high. The gnomon on each face is approximately 60 cm long, and 16-19 mm in diameter. Each face has Roman numerals to indicate apparent solar time from 6am to 6pm. Alpha and Omega Greek letters. A carved cross at the twelve hour line. Inscribed "1904"
Monterrey Nuevo Leon Mexico Equatorial Dial 488
This equatorial dial is just over 3 m in size, made of iron. Along the equatorial band are twelve Roman numerals to indicate apparent solar time and twelve Arabic numerals to indicate standard time. The outside of the equatorial band has zodiac constellations. There are also solstice and equinox discs at the gnomon. There is a plaque for the equation of time and an explanation of time corrections next to the sundial. The dial sits on a 1 m high stone base.
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.
West Des Moines Iowa USA Armillary Dial 486
Stainless steel armillary sphere, approximately 8 foot in diameter. No numbers. Slits for hour lines.
West Des Moines Iowa USA Armillary Sphere Dial 485
Armillary sphere memorial, approximately 18 inches in diameter. Painted steel or bronze
Des Moines Iowa USA Horizontal Dial 484
Several horizontal dials. East dial is a small bronze dial, vandalized gnomon is missing; incorrect orientation. North dial is a 4 foot marble dial
Des Moines Iowa USA Horizontal Dial 483
A very large and striking horizontal dial 50 feet in diameter with a 15 foot tall metal gnomon. Hours are marked by bronze plaques and Roman numerals
Palo Alto California USA Vertical Dial 482
A vertical declining dial approximately 45 x 55 inches. Made of aluminum and brass. Shows the hours from 8 am to 5 pm using analemmas. Analemmas are bounded by the summer and winter solstices and a straight line through them shows the equinox. Daylight time is shown using Roman numerals, with standard time shown in Arabic. In keeping with the motto, a simple equation is written on the dial face, d/dt is not equal 0. Designer Ronald Bracewell used an oculus, a disk with a central hole, standing 8 cm in front of the dial face. The disk casts a shadow with a bright sunlight dot to indicate both time and season. Hour lines include longitude correction. This has been relocated; it was previously hanging free below a south facing wall, facing the Terman Engineering Building. Dial is now located on the wall of a covered walkway area.
Honolulu Hawaii USA Vertical Declining Dial 481
An elegant vertical declining and reclining dial built on the sloping face of a large lava boulder. Total size of the dial is 4 1/2 x 6 feet and uses a half-inch thick copper gnomon 6 x 10 inches. Hour lines and numerals at 9, 12, and 3 are of brass. The dial is corrected for longitude and was designed to fit its deep valley location and orientation of the boulder. Tradition holds that these rocks have spirits and must be treated with respect.
De Dedo Guam USA Analemmatic Dial 480
This analemmatic dial approximately 10 x 20 feet set into concrete. At the low latitude of Guam, the gnomon standing spot extends outside to ellipse of hour markers. Between April and September the shadows are very short near the noon hour and are difficult to read.
Council Bluffs Iowa USA Vertical Gnomon Dial 479
Vertical gnomon casting its shadow onto a plaza in front of the city library. Modernistic design. This dial has been scheduled for removal as of October, 2010 due to cracking and to make more green space.
Edinburg Texas USA Vertical Gnomon Dial 478
A vertical gnomon 19.58 feet tall projects its shadow onto a modernistic courtyard. The courtyard has inlays showing the hour corrected for the equation of time, give a sinuous set of curves to the hour lines.
Colima Colima Mexico Equatorial Dial 477
A bright bronze equatorial sundial with a stainless steel equatorial band. The gnomon has an analemma for the correction of time and a colorful sunburst near the northern end of the rod.
Santa Rosa California USA Equatorial Dial 476
An bronze equatorial dial about 2 feet in diameter. Stands in the middle of a Lotus flower
Greenfield Massachusetts USA Hours To Sunset Dial 475
A 5 foot diameter pink Canadian granite horizontal hours-until-sunset dial. The 8 inch thick granite slab weighs 2000 pounds and rests on a short recessed pedestal, appearing to float above the grass dome of a memorial garden. Lines for hour periods 2-12 are marked with Arabic numerals. The gnomon is a 3/8 inch brass rod protruding 4 inches above the dial face. The dial face is engraved, "HOURS UNTIL SUNSET" and, "READ TIP OF SHADOW." This sundial does not function in the usual manner that tells time of day. Rather, this dial tells the number of hours from the present time of day to the time of sunset. These are equal-period hours counted down until sunset. Since it shows a time period, rather than time-of-day, the dial accuracy is not affected by season of year, daylight saving time or longitude location within the local time zone. Further, this particular design uses a horizontal dial face, while most hours-until-sunset dials use a vertical face. This dial is dedicated as a memorial to Dr. Pallav Parakh, a much-loved surgeon who was killed in a tragic auto accident while walking in a crosswalk.
Charleston West Virginia USA Equatorial Dial 474
A bronze equatorial sundial, about 4 feet in diameter.
New London Connecticut USA Horizontal Dial 473
A horizontal dial of striking modern design about 24 inches in diameter. The dial face is granite with milled wedges, leaving hour lines from 6 am to 6 pm. Hours are represented by small round bronze markers. The gnomon is of unusual design. When installed, the gnomon had a vertical glass plate below the style. The dial doubled as a fountain - water flowed from the top of the gnomon down the glass plate. Each of the bronze hour markers also had a small spray of water. The round granite dial is slightly smaller than the octagonal pedestal and base. A small trough between them recovers water from the fountain. The fountain is turned off during the winter. Judging by the mechanics of the fountain, it may to be turned on. The original glass plate has been replaced by a metal plate. The dial is part of a memorial installation called the "Ad Astra Garden" and was designed by an art professor at the college.
Amherst Nova Scotia Canada Horizontal Dial 472
A Centennial Dial for Amherst, this is a square horizontal dial with clean design about 18 x 18 inches. The dial face and triangular gnomon are cast bronze sitting upon a granite pedestal. The dial has hour lines and Roman numerals from IIII (morning) to VIII (evening) and tick marks for the quarter hours. An accompanying display explains the function of the sundial and contains a table for the Equation of Time, including longitudinal correction.
Cocoa Florida USA Equatorial Dial 471
This is a simple equatorial dial 58 inches wide and 49.5 inches high. Because of the low latitude, the 6 inch wide equatorial band has Roman hour markings only from 7am to 5 pm. The gnomon is a thin, unadorned rod. The dial base is a square box with canted top to the Florida latitude, supporting the equatorial cross members.
Monticello Virginia USA Globe Dial 470
A replica of Jefferson's lost dial, which he recounted in 1817, "My dial captivates every body foreign as well as home-bred, as a handsome object & accurate measurer of time." Made according to Jefferson's design, the replica dial is a 10 1/2 inch painted wood sphere with horizontal lines drawn for the equator, Tropics of Cancer and Capricorn. Longitudinal lines are drawn between the two tropics to indicate the hours of the day. A gnomon fixed to the poles swings around the globe until it casts the smallest meridian shadow. The original sphere was made of black locust wood but the replica is mahogany because it is "more durable, stable and easier to find." The base was originally a model of a capital, the top part of a column, that Latrobe had designed for the U.S. Capitol. It was unique, featuring ears of corn in motif. When Jefferson received the base from Latrove, "it looked bald for want of something to crown it" and so Jefferson designed a globe that "might be made to perform the functions of a dial."