Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Ohio

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Cleveland Ohio USA Horizontal Dial 405
A ground level horizontal dial 14 feet in diameter, with gnomon 5 ft 3 inches high. The dial is made of concrete, brick, and granite.
Clifton Village Ohio USA Vertical Dial 610
A 35 x 23 inch vertical acrylic painted wood dial. Dial face includes longitude-corrected hour lines with Roman numerals, noon analemma, and equinox and zodiacal declination arcs. The dial is designed for a declination of 1° 18' West of South. Dial nomenclature includes location, declination and time zone offset.
Coalinga California USA Horizontal Dial 764
A 26 inch diameter hand-carved, lacquer-coated beige sandstone horizontal dial set flush in a massive cast concrete pedestal. Dial has a thick stone gnomon, hour, half-hour and quarter-hour lines with Arabic ST hour numerals corrected for longitude. Face is marked with symbols showing sunrise and sunset times on solstices and equinoxes and with location coordinates. Dial face includes a hand carved graphic of a Valley Oak tree, symbolic of the San Joaquin Valley dial location. The dial is embedded in a three foot cube cast concrete pedestal bearing a bas relief image of a horned toad, mascot of the Coalinga High School and the city centennial dates 1906 - 2006.
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.
Coeur d'Alene Idaho USA Horizontal Dial 812
In 2013 the city of Coeur d'Alene began a $20M renovation of downtown McEuen Park, a 22-acre expanse, to include a large sundial. But shortly after the renovation started, the city commissioners were told the $51,000 that was to be spent on the sundial was instead to be used to install heavier electrical infrastructure for support of major park events. Fortunately by the end of 2013, the City Staff announced that the sundial was added back to the park's plan, made possible by a $50,000 donation from Parkwood Business Properties.
Cohoes New York USA Horizontal Dial 239
12' Bronze 10' Metal dial mounted on marble(?) square atop column. Roman numerals 5AM-7PM. 'Van Schaick Island Golf Club' on dial face above inscription. 'In memory of/ John F. Gaucas/ Who Served as Golf Professional at the/ Van Schaick Island Country Club/ 1944 to 1974' on small granite marker near base of dial.
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.
College Park Maryland USA Horizontal Dial 260
Very large horizontal dial 25 foot in diameter. Concrete dial with bronze gnomon 6' 6" high at tip. Has hour markers on raised circular slab. Metal disc with university seal in center of pierced gnomon. Adjacent graph provided correction for both EOT and mean/standard time differences. Due north or gnomon are shadow markers for date of year. Relocated May 1991 to present site.
College Station Texas USA Armillary Dial 134
Called the Texas A&M Armillary Sphere, this sundial is 60 inches in diameter. Made of wrought iron, it has one large vertical ring representing the meridian at College Station. Attached to the inside of this ring is a wide band representing the celestial equator. The outside of this band is decorated with gold signs of the zodiac. On the inside are gold roman numerals for each hour. A rod with gold tip and ornate fan is the gnomon. A metal plaque mounted nearby gives a description of the dial and EoT corrections. Dial donated by Searcy Bracewell, class of '38. Built by Kenneth Lynch & Sons, Wilton, CT. Dial sits atop a concrete cylinder, 2 foot high, 3 foot diameter.
Collegedale Tennessee USA Equatorial Dial 113
ca 6'cylindrical segment, about 3' high Stainless steel Large equatorial, corrected for longitude. Nodus is a hole on a horizontal gnomon rod running E/W across face. Can compensate for DST by shifting dial via bolts/slots in base. Solstice lines run along top/bottom edge of cylinder. Built by Fabricators Inc., Chattanooga TN
Collingwood Ontario Canada Equatorial Dial 333
The 12 inch equatorial dial is made of brass with a thin wire gnomon along the polar axis. The dial is mounted on a stainless steel cube with an engraved Equation of Time correction table on the four sides of the cube. The sundial is dedicated to those age 80 an older who have skied at the Oster Bluff Ski Resort. They remind us that the days of enjoyment continue in the winter of our lives, we celebrate the wisdom and social grace they have shared with us as well as their devotion to the sport of skiing. January 1996
Collinsville Illinois USA Woodhenge Dial 94
At the Cahokia Mounds is a woodhenge discovered in the early 1960's during excavations and has been reconstructed. There are a series of wood posts in multiple circles that indicate various solar events such as the solstices, equinoxes, and what are thought to be special festival days related to the agricultural cycle of the region. Critical posts also align with the mounds of the site on certain dates. The outer of 3 circles of posts has a diameter of 410 feet with 48 equidistant posts. Each post is about 20 feet high. Equinox and solstice sunrise observations are held at the site on the Sunday morning closest to the event.
Colma California USA Horizontal Dial 21
This large ground-level horizontal dial is 50 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.
Colorado Springs Colorado USA Equatorial Dial 570
A 4 inch thick rose granite equatorial dial with a triangular dial face 60 inches on a side. A 70 inch long gnomon rod holds a 6 inch diameter spherical bronze nodus showing Earth as seen from space placed so that the Earth's axis is on the gnomon axis. The dial face shows solar noon and the dateline shows the date at solar noon and the equation of time. The granite plates are set 4 inches into concrete.
Colorado Springs Colorado USA Horizontal Dial 604
A monumental 120 foot diameter horizontal dial of painted concrete with a vertical 12 foot high concrete gnomon. Standard time and DST hour numerals are shown as are solstice and equinox lines. Dial face includes two 6 foot diameter inlaid mosaic maps of the Western and Eastern Hemispheres. The gnomon is a truncated three-sided equilateral pyramid that inclines to the north so that the northern corner is vertical. Two bronze plaques give instructions for reading and equation of time correction. Seen from above, the overall design incorporates a Yin Yang symbol appropriate for this elementary school specializing in teaching Chinese language and culture.
Colorado Springs Colorado USA Point in Space Dial 696
A point-in-space or nodus dial with a 65 foot diameter dial face with seasonal markers extending nearly 150 foot wide due to uneven terrain. Time and date are indicated by the shadow of the tip of the 15 foot high curved gnomon. The dial is made of concrete, steel angle, cast iron and Breeze Stone, a compacted crushed stone. Roman hour numerals are cast iron, cast by students at The Colorado Springs School. The dial was designed and built by students, alumni and faculty of the school over a five year period. Provision is made for 60 stone date markers, set to indicate dates of significance to the school calendar.
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)
Colorado Springs Colorado USA Vertical Dial 499
A vertical dial approximately one meter square, built into the wall of the 1907 Van Briggle Pottery building. This Memorial Pottery building was erected after Artus Van Briggle's death. The Van Briggle Pottery Company is now using the Midland Railway roundhouse at Hwy 24 and 21st. In addition to hour lines with Roman numerals, surrounding tiles have pictures of the zodiac. In 1994 Colorado College repaired the gnomon and added a metal equation of time plate.
Colorado Springs Colorado USA Horizontal Dial 500
An old horizontal dial approx 60 cm diameter. From 1914-1967 was located at Marksheffel Garage, relocated to Monument Valley Park in 1967. The builder may have been van Briggle Pottery, but its history is more complex: The angles of the hour lines are consistent with a latitude of 43.9° (roughly) but the present location is 38.9°. A gnomon (probably not original) was cut for 34° lat, but has now been corrected. Likewise, the whole dial had to be rotated to true north, being off by some 47°. Hour lines have eroded, and those before 6am and after 6pm radiate from the wrong side of the gnomon. The city has spent a considerable amount of money cleaning up the area, removing the shrubs that blocked sunlight and building a nice brick wall with flowerbeds, so the area looks better, but the dial is worse than ever, with vandals bending the gnomon.
Columbia Missouri USA Cylindrical Dial 496
A cylindrical dial 10 inches in diameter constructed of photoengraved aluminum. The elegant dial plate shows each hour line as a full analemma and lines for Central Standard and Central Daylight Time. Accompanied by seasonal lines of solstice, equinox, monthly lines and other dates during the year. Back and base of dial are constructed of PVC.