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.

 
 
San Diego California USA Armillary Dial 79
An armillary dial 55 in. diameter designed by L. Gordon Plummer. Rings made of 1/75x2 in. hollow steel hoops. Possibly gone now. Member Woody Sullivan unsuccessfully attempted to locate this dial in 1992.
 
 
Huntington Beach California USA Vertical Dial 78
A 7x8 foot direct south facing vertical dial of wood with metal gnomon on the masonry stucco side of a fire station building. Hour lines are painted on wood planks bolted to the side of the building. Metal Arabic DST hour numerals are mounted to the wood planks. Longitude correction is not included and there is no EOT correction or instructions offered but dial is accurate when both corrections are applied. When built in 1978, the hour numerals marked Standard Time; when rebuilt sometime before 2010, the new hour numerals now mark daylight saving time. The fire station building wall declines approximately 18.5? east of south but the wall area holding the dial has been built out to correct (perhaps not quite enough) this angle.
 
 
Los Angeles California USA Equatorial Dial 77
A bronze equatorial ring dial with taut wire gnomon on concrete pedestal. Ring is inscribed with hour, ten-minute and minute lines. Plaque states the dial indicates correct watch time so observatory staff periodically rotates clamped ring to correct for EOT, longitude and DST. Dial is located adjacent to the Astronomers Monument atop which is a large bronze armillary. The monument recognizes Hipparchus, Copernicus, Galileo, Kepler, Newton and Hershel. The sundial was originally built into the base of the Astronomers Monument but was relocated a few feet to the south during the 2002-2006 remodeling to allow visitors to more closely approach the dial. The dial sits atop a concrete pedestal.
 
 
Death Valley California USA Vertical Dial 76
Prospector and con man Walter Scott convinced Chicago millionaire Albert Johnson to invest in his gold mine in the Death Valley area. The mine was a fraud, but Johnson began building his Spanish Revival Villa in 1922 that continued until the stock market crash of 1929. Martin de Dubovay was the architect, Mat Roy Thompson was the engineer and head of construction, and Charles Alexander MacNeilledge was the designer
 
 
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.
 
 
Seattle Washington USA Analemmatic Dial 74
27' Bronze, concrete Viewer becomes the gnomon. As of 1994, structure is unstable and corroded. Badly in need of refurbishing. Press release w/quotes from designer on file.
 
 
Williston Vermont USA Horizontal Dial 73
Pyramidal shape. Markers trace the paths of the shadows cast by the top of the pyramid on solstice and equinox days. Originally at the Brattleboro Museum, it was moved to its present location in 1993.
 
 
Swanton Vermont USA Horizontal Dial 72
Cedar wood 10' cedar pole covered with copper tiles forms the gnomon. Flowers and an evergreen hedge mark shadow paths of equinoxes and solstices. IAPS Listing survey May 1992. Some hour markers missing.
 
 
Johnson Vermont USA Horizontal Dial 71
One of Kate Pond's first dials, a winning design for an 18 foot diameter dial that now resides on the Johnson State College green. Concrete, Stainless Steel. On the ground concrete paths mark the N-S and E-W axes. The gnomon is a 3 inch stainless steel pipe 9 feet long attached to a concrete base. The hours are marked with 1 foot diameter Vermont granite stones, and at the cardinal points are larger stone markers. Kenneth Leslie, Assistant Professor of Art, remarked, " I have the idea of a student sitting against the North marker, reading a newspaper for a noon class, and knowing it's time to leave when the shadow crosses his paper."
 
 
Jerico Vermont USA Horizontal Dial 70
50 foot diameter horizontal dial of steel, concrete and stone. Called "Polaris". The gnomon is 10 foot high forming a stone pyramid. As the sun shines through a hole at the center, an analemma is traced on the ground. Markers identify equinox sunrises and solstice sunsets. The dial was built by Kate Pond and her students. See NASS Compendium Vol 1, No. 2, May 1994.
 
 
Toddsbury Virginia USA Horizontal Dial 69
Brass
 
 
Houston Texas USA Dial 68
Large gnomon with a lens which focuses the noonday sun near the equinoxes. Hour lines built to compensate for equation of time.
 
 
Amarillo Texas USA Gnomonic Dial 67
The Centennial Time Tower begins as a tetrahedron of stainless steel pipes each 18 feet long. Then a central pipe towers to the sky, giving an overall height of about 50 feet. The Time Tower is situated on a circle about 100 feet in diameter. The dial was erected for the hundredth anniversary of the discovery of Helium. Each individual pipe is a time capsule filled with helium. The plaque under the center of the tower shows when each one is to be opened.
 
 
Trois Rivieres Quebec Canada Vertical Dial 66
A declining vertical dial approximately 6 feet wide and 8 feet tall of painted wood. Diol declines 58? west of south. Dial includes a two-lined analemma noon mark that shows noon corrected for EOT. Hour lines with Roman numerals show local time from 10 AM to 7 PM. Dial is located about 30 feet high on a wall, above an alcove with a statue of the Virgin Mary. The gnomon length is correct for the shadow of the tip to fall on the noon mark. Dial furniture includes a lunar crescent and a depiction of a beaver carrying a tree branch, in a classic French tradition and similar to dials of Zarbula's overall design.
 
 
Stanstead Quebec Canada Horizontal Dial 65
A horizontal dial "sculptural triptych" called "Zig-Zag". Three steel pipes 8x15x13 feet define the sundial. The shadow from its highest point will run along the lower horizontal section exactly E-W at the equinoxes. Stainless steel bolts on the horizontal section serve as hour markers to that time is recorded throughout the year, with the first section of the zigzag serving as the gnomon. The dial-sculpture was funded in part by a 1991 award of a Vermont Community Fund Grant. See NASS Compendium Vol. 1 No. 2, May 1994
 
 
University Park Pennsylvania USA Armillary Dial 64
A bronze armillary dial with meridian and equatorial rings and Arctic and Antarctic circles on a stone pedestal.
 
 
Oberlin Ohio USA Calendrical Dial 63
When is a flag pole more than a flag pole? When it has cement walkway curved for the summer solstice, a path for the winter solstice and a distinguishing straight cement line for the spring and fall equinox. This dial has no hour markers, and is intended to show the seasons. The tip of the flag pole will follow these lines at the appropriate day of the season.
 
 
London Ontario Canada Helioscope Dial 62
A brass Pilkington-Gibbs heliochronomer aligned to the celestial equator. Rotate the helioscope until the sun shines from the upper hole to the lower plate, then read the time from an accompanying dial. The Pilkington-Gibbs dial includes a patented cam mechanism to adjust for the Equation of Time.
 
 
Great Falls Montana USA Equatorial Dial 61
A monumental bow-string equatorial dial of curved 4x6 inch welded steel I-beams forming a 14 foot diameter equatorial arc. Stainless steel Roman hour numerals 5 AM to 7 PM are welded to the arc. Metal for the dial was once used at Rainbow Dam and was formed and welded at Rainbow Powerhouse. This dial was the inspiration of Gary Trescott, a River's Edge Trail volunteer who planted hundreds of trees along the trail and helped improve the trail for many years. Gary died in June 2012 but his work on the sundial was continued by Dana Woodward (Gary's cousin), Doug Norwick and others.
 
 
Rochester New York USA Equatorial Dial 60
A large 40 foot equatorial dial. The dial band is about 5 feet wide with raised Roman numerals at each hour mark. The gnomon is a rod approximately 15 feet long, ingeniously suspended by wires at the center of the dial. No shadow of the support wires can be seen, just the line of the gnomon appears on the dial band.