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.

Oakland California USA Horizontal Dial 236
Large horizontal dial, with steel gnomon 22 ft. long, 14 ft. high. Constructed of three welded pieces of 2-inch thick steel plate, the dial sits in a courtyard. There are no hour lines, only hour markers are placed on the lawn and brick patio around the dial. EOT values for every 5 days are shown on the north face of the support.
Vallejo California USA Polar Dial 235
A 5 ft. aluminum polar dial. The gnomon has the profile of the Golden Gate Bridge. Dial was a gift from Vallejo's Sister city, Akashi, Japan.
Louisville Kentucky USA Equatorial Dial 234
ca 16' x 20' Portable equatorial, set up and used for teaching a solar energy class.
Pekin Illinois USA Horizontal Dial 233
A unique horizontal dial using both a sloping 15 foot aluminum gnomon and much taller 45 foot vertical pole. The ground level dial face consists of seven analemmas drawn in the grass field that surrounds the dial center. The analemmas are drawn for the hours 8-AM to 3-PM 3, corresponding to the tip of the sloping aluminum gnomon. However, the noon analemma is larger and corresponds to the shadow of a disk atop the vertical pole. The board of directors for the Pekin Park District offered a large place in the Mineral Springs Park Sunken Garden for Henry Cakora's desire to build a sundial. Henry designed and cast the dial, and the dial was built with assistance from local contractors and individual volunteers.
Santa Barbara California USA Equatorial Dial 232
A small bronze equatorial dial made by Victor E. Edwards in the 1920's. It has an unusual crescent shaped arm with notch at the upper end. The arm is rotated until sunlight through the notch strikes an analemma on the lower inner curve of the crescent. Time is then read on a circular dial from an "hour hand" pointer extending from the base of the crescent. The dial is mounted on a granite pedestal with spherical top 21 inch high.
Ewing New Jersey USA Combination Dial 231
A combination horizontal and equatorial dial. Stainless steel equatorial ring is 8 feet wide x 10 feet high. Equatorial gnomon extends to cement face of horizontal dial. Bronze plaque provides a table of corrections for EOT and longitude. Identified as the William H. Hausdoerffer Sundial to honor Dr. Hausdoerffer, Class of 1936, Professor Emeritus of Mathematics, Department Chairman, Dean of Men, TSC Athletic Hall of Fame, Alumni Executive Board and adviser to many groups, serving from 1940 to 1979.
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.