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.

Ottawa Ontario Canada Horizontal Dial 230
A large horizontal floral dial approximately 20 feet in diameter. Large circular area on ground forming the dial face with gravel and flower-beds between the hour lines. The flowers are annuals, best seen in the summer blooming season. Update Nov 1996: The dial is still there, but the flower beds are gone. Update 2016: flower beds are back, but the pipe gnomon is badly bent. The gnomon angle at the bottom is correct, but the pipe section is bent and off axis.
Philadelphia Pennsylvania USA Horizontal Dial 229
Brass horizontal dial by Alexander Stirling Calder. Local Hour lines plus EoT monthly corrections and differences between 12 world cities. Pedestal Sculpture is white marble and depicts 4 seated young women as the 4 seasons holding the dial on their shoulders. Built in 1905. Tip of gnomon appears damaged. The dial base is carved marble depicting four seated young female figures representing the four seasons.
Chicago Illinois USA Equatorial Dial 228
Equatorial in bronze. 2 meters in diameter. Arabic hour numerals. Hour scale is subdivided into 5 minute intervals.
Silver Bay Minnesota USA Horizontal Dial 227
A horizontal dial on the ground, with an hour circle about 12 feet. The gnomon is of steel, about 4 foot high. The gnomon is oriented to magnetic north. It is not an accurate device. Three boulders surround the dial and cut off the shadow much of the time. Gravel hour circle has rocks to mark the hours, but the rocks can be moved and are strewn all about. More suggestive of a dial than a real dial.
Macon Georgia USA Horizontal Dial 226
A horizontal dial 16 inches in diameter located beside the observatory, just outside the museum. Includes hour markings for EST and DST and an EOT graph. Hour lines corrected for longitude. Mounted on a 24 inch high pedestal low enough for children to enjoy.
Steamboat Springs Colorado USA Equatorial Dial 225
A large 6 ft. spherical of structure with two 270 degree arcs that intersect and right angles.
St. Petersburg Florida USA Equatorial Dial 224
An equatorial dial built by Erickson Monument Co in 1974 for the War Veterans Memorial Park. Dial is 6 feet in diameter made from granite. The gnomon rod of about 3 inches diameter is stainless steel. Hour, half hours, quarter hours and five minute marks show the time. For symmetry, the face has hours marked for the entire 24 hours, though in Florida the excursion of time from 6am to 6pm is relatively small. The hour lines are rotated for the site longitude.
Chicago Illinois USA Equatorial Dial 223
Henry Moore Sundial Sculpture: 13 foot bronze equatorial dial built in 1980. Two bronze semicircles, one set inside and at right angles to the other, form the main elements. A slim rod runs from one end of the outer semicircle to the other end and its shadow on the inner semicircle below marks the time of day. EOT correction is provided.
Colorado Springs Colorado USA Analemmatic Dial 222
Analemmatic dial in granite and bronze. 9ft x 12ft. Mottled granite block surface with number border of smooth granite blocks. Hour numbers are engraved in granite. Zodiac marker is brass, embedded in the granite face. Not corrected for longitude, but the location is very close to the center of the time zone. User stands on center analemma at correct date and acts as the gnomon. The central standing analemma shape is wrong: it should be a straight line. Also, the aspect ratio is not correct for the latitude and the positions of the solstice markers are slightly off. Major semi axis: 289.56 cm Minor semi-axis is 175.89 cm (should be 182.31 cm) Summer Solstice is 81.92 cm (should be 97.82 cm) Winter Solstice is 83.82 cm (should be 97.82 cm)
Lake Buena Vista Florida USA Conical Dial 221
Conical dial 120 ft. high, 122 ft. diameter at base and has an 85 ft circular opening to the sky. In the middle of the opening is a spherical nodus that casts its shadow into the concrete structure. According to the Guinness Book of Records in 1995, this is the world's largest sundial. Designed by Isozaki and calculated by Ross McCluney, the sundial is a large truncated, slanted cone, with hour markings on the inside. McCluney was NASS's first president.
Indianapolis Indiana USA Equatorial Dial 220
A five foot diameter donut-shaped full circle equatorial pierced by equally massive Indiana Limestone shaft as gnomon. Hour numerals are Arabic. Subdivided into 15 minute increments. EOT is given. Made my David Rogers in 1987 and reported to be Indiana's largest equatorial dial.
Oberlin Ohio USA Vertical Dial 219
Once, high on the physics building south wall was a student made vertical dial. The 5'x8.5' resin coated particle board made by Mark Kearns in 1979 had curved hour lines to account for the equation of time, declination of wall, and offset from standard meridian. This dial has not been on display for some time. Perhaps some student would create a new dial. The brick wall is an excellent location.
Washington District of Columbia USA Horizontal Dial 218
Horizontal dial 12 in. square designed and built by David Shayt and David Todd of the Smithsonian Institution. Roman numerals, 5AM-7PM. Subdivided into 15 minute increments. Also has compass rose. Dial sits atop a rectangular granite pedestal.
La Crosse Wisconsin USA Armillary Dial 217
A 40 inch diameter armillary on a 2 foot tall cement cubic base. The original analemma-shaped gnomon was missing and replaced with a section of loose ordinary electric wire. Includes a longitude-correction plaque showing the corrections throughout 15 degrees longitude. Dial sits atop a 26 inch high, 26 inch square pedestal. Robert Allen states that this dial is a scaled down version of the one at the San Diego Zoological Garden, and that there is a similar one at Williams College in Williamstown MA.
La Porte Texas USA Armillary Dial 216
Approximately 6 foot diameter bronze armillary dial with equatorial, meridian and equinoctial colure rings and with Arctic and Antarctic circle rings. Hour lines have 5 minute marks and Roman numerals. Equatorial ring has Zodiacal signs. Base shows the Great Seal of Texas and includes a bronze eternal flame. Names of fallen heroes are inscribed on the base and paths to and from the dial lead to location of Sam Houston's troops prior to the battle of San Jacinto. The San Jacinto Monument is seen in the distance.
New York New York USA Equatorial Dial 215
A half-cylinder equatorial dial whose body structure is exactly the same as the one (#28) at Trinity College, Hartford, CT, only the pedestal here is lower. Named ?The Camp Columbia Sundial?, a gift of Camp Columbia to memorialize Dean Hennessy (1917-1991).
El Cajon California USA Armillary Dial 214
Armillary dial about 3 ft. diameter designed by Don LeGrande. As of Christmas 1992, a stunning armillary sphere-type of sundial ... The framework of the dial is constructed of burnished stainless steel. ... The rod-like gnomon was destroyed by vandals many years ago, but the rest is in good shape.
San Diego California USA Horizontal Dial 213
This is not the Koester dial at SDSU, but a far more interesting horizontal dial originally dedicated to the San Diego Normal School for elementary teaching by the class of June, 1911. The 18-inch octagonal bronze dial was originally designed by San Diego Clock maker Joseph Jessop and mounted on a miniature Doric column. The dial was placed within the circular lawn directly in front of the school's main entrance at the intersection of Park and El Cajon Boulevards.
Anacortes Washington USA Vertical Dial 212
4'x8' Marine Plywood & Aluminum Gnomon and struts made of copper plumbing pipe. Refurbished by Threat in 1992.
Windsor Connecticut USA Equatorial Dial 211
Equatorial dial about 5 ft. diameter made of brass and stainless steel The analemma is incorporated into the gnomon compensating for equation of time. Equatorial ring is rotated to compensate for difference in longitude to time zone. Designed and built by Physics/Astor Dept, University of Calgary, Alberta Canada. Dial sits atop a stone plinth marked with Keller's laws.