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.

 
 
Windsor Ontario Canada Noon Mark Dial 779
A 12 foot high noon mark dial consisting of two closely spaced triangular vertical plates, a protruding needle and pairs of summer and winter solstice "wings" that together project a shadow onto the surrounding concrete deck within a 40 foot diameter reflecting pool. When the sun totally illuminates the narrow space between the vertical plates, it is local noon and the shadow cast by the protruding needle points true north. On the summer solstice, the shadow cast by the smaller, upper solstice wings will be at its narrowest width. On the winter solstice, the shadow cast by the lower solstice wings will be at its narrowest width.
 
 
Sterling Virginia USA Reflection Dial 778
A reflection dial using a mirror in an upper window to project a solar image spot onto the west facing vertical interior wall of a church. Copper medallions on the wall show the spot location at 10:30 AM throughout a year and depict the analemma curve.
 
 
St. Louis Missouri USA Equatorial Dial 777
A cast aluminum equatorial dial 15 inches in diameter with a rotating, two-part, three-dimensional analemmic gnomon; this is a classic Schmoyer dial completed by Bill Gottesman. One gnomon half is used from summer solstice to winter solstice; time is shown by a beam of light passing through the gnomon slit to fall on the hour ring. The other gnomon half is used from winter solstice to summer solstice.
 
 
St. Louis Missouri USA Equatorial Dial 776
A 10 inch wide, cylindrical-segment equatorial dial 8 inches high, fabricated from a section of large PVC pipe. The dial face is aluminum sheet bonded to the PVC pipe and marked by photochemical engraving with hour lines showing analemmas to correct for EOT; hour lines are corrected for longitude and show both standard and daylight saving Arabic hour numerals. Winter and summer solstices and equinoxes are marked. Time and date are read by the shadow of the intersection of the two gnomon rods. Instructions are included on the dial face and plaque.
 
 
St. John's Newfoundland Canada Horizontal Dial 775
A 10 inch diameter heavily cast bronze horizontal dial with bronze gnomon that was apparently replaced or remounted in the past. The dial face includes hour and half-hour lines and Roman hour numerals from 5 AM to 7 PM. The center of the dial face shows a simplified map of the world. The dial sits atop a stone pedestal with a two-part octagonal base. The base is inscribed with a dedication to the memory of Sir Edgar Rennie Bowring, K.C.M.G. (1858-1943), industrialist, born at St. John's, Newfoundland on August 17, 1858, son of John Bowring and Mary Rennie.
 
 
Santa Clara California USA Equatorial Dial 774
A 5 foot 9 inch wide cast bronze ring equatorial dial on a low brick mortared pedestal. The full semicircular hour ring has hour, half-hour, fifteen minute and 5 minute marks, and Roman hour numerals. The dial is lightly patinated and has a central gnomon rod with arrowhead.
 
 
Reston Virginia USA Analemmatic Dial 773
An analemmatic dial with 8 foot semimajor axis painted on the asphalt playground of the Neil Armstrong Elementary School. Hour marks for 5 AM to 7 PM include longitude correction; Arabic hour numerals for both standard and daylight saving time are shown. The date line is decorated in bright colors with icons symbolic of holidays and seasonal weather. The dial was the Boy Scout Eagle Service Project of William T. Spriggs and was painted by local Boy Scouts and their fathers.
 
 
Phoenix Arizona USA Vertical Dial 772
A dual-vertical cube dial with two 12 inch square dial plates declining 45? south of east and south of west. The east face shows hour lines for 6 AM to 12 PM; the west face shows hour lines for 12 PM to 6 PM. Roman numerals mark three hour lines on each face. The other two faces of the cube hold plaques with EOT corrections and information about its dedication for the Arizona Centenary in 2012. The dial faces and the EOT plaque are ceramic tile, diamond engraved and filled with black grout. The gnomons are thick-profile copper and made small to cast shadows on only the hour lines. The dial is about 5 feet high overall with a stucco-coated pedestal made of concrete blocks resting on a massive, reinforced concrete base
 
 
McDonald Observatory Texas USA Horizontal Dial 771
A monumental horizontal dial on a cast concrete base with a 5 foot high polished granite gnomon. Hour lines radiate from the gnomon root and hour markers with Arabic numerals are placed on a square about the gnomon. Instructions for reading the dial are engraved on the side of the gnomon.
 
 
Bloomfield Hills Michigan USA Equatorial Dial 770
An equatorial dial of cast bronze. The heavily patinated dial has Roman hour numerals IIII through VIII and a cast bronze pointer marked, "DAYLIGHT SAVING." 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 sits atop a marble pedestal engraved, "The A. N. Goddard Sundial."
 
 
Croton-on-Hudson New York USA Horizontal Dial 769
A 13-1/2 foot tall monumental horizontal dial memorial to the victims and responders of the 9/11/2001 World Trade Center terrorist attack. The memorial sundial gnomon is created from an 11000-pound, 14-foot long twisted steel beam once part of the North Tower of the World Trade Center. The gnomon is held at an angle of 41 deg 12 minutes by a 16-ton boulder with inset channel to cradle the twisted steel.
 
 
Corregidora Queretaro Mexico Projection Dial 768
A projection (or, "negative") dial using the south-facing wall and floor of the "Cosmic Room" of a "casa de campo" private cottage. The tile roof over this room contains several skylights with slits for projecting a beam of sunlight onto the wall and one skylight with a small hole to project a dot of sunlight onto the room floor.
 
 
Carbonear Newfoundland Canada Horizontal Dial 767
A 10 inch diameter horizontal bronze dial with engraved nomenclature. Hour numerals 4 AM to 6 PM are Roman; ten minute numerals are Arabic and two minute marks are shown. Minute numerals are engraved in sequence 60, 20, 40, 60. Face engravings include EOT dates, "WATCH FASTER" and "WATCH SLOWER" and a central compass rose.
 
 
Nashville Tennessee USA Analemmatic Dial 766
A 16 x 12 foot analemmatic dial placed in the Experience Center of the 200 acre Ellington Agricultural Center. Dial is built of paver stones flush to the surroundings with painted inset circular hour marker paver stones and rectangular paver stones for the central date line. Directions for use are painted on the date line.
 
 
Annapolis Maryland USA Armillary Dial 765
A bronze armillary dial with meridian, horizon and equatorial rings on a concrete pedestal. Dial is located in Government House residence and requires a tour of the property for access.
 
 
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.
 
 
Lake Oswego Oregon USA Analemmatic Dial 763
An analemmatic dial with 20 foot major axis, 14 foot minor axis with hour markers and date line made of sandblasted concrete paver stones. A platform stand on the west side holds instructions on using the dial. A preliminary version of this dial was included on the 2009 NASS Conference Sundial Tour.
 
 
Carbonear Newfoundland Canada Armillary Dial 762
A four foot diameter armillary dial built of 1.5 x 0.5 inch flat steel bar and 3/4 inch steel rod. A 1/2 inch steel rod gnomon casts the shadow on an aluminum equatorial ring, which includes hour and 5 minute marks. Dial includes horizon, equator, ecliptic, tropic, Arctic and Antarctic Circle rings. A nearby granite boulder holds a plaque for EOT correction, location and inscription. The dial is a gift to the town from Dr. L. A. Wells and was installed on his 87th birthday.
 
 
Orosi Valley Cartago Costa Rica Point in Space Dial 761
A 25 foot long point-in-space or nodus dial. The dial face is crushed stone. The 8 AM - 4 PM hour lines are red adoquine paving stones and the noon hour line is identified by adjacent gray paving stones. The dial equinox line is a row of gray paving stones. Solstices are identified by the curve formed by the tip ends of the hour lines.
 
 
Wynndel British Columbia Canada Equatorial Dial 760
A ring equatorial dial built inside a cross-sectioned propane LPG tank. The equatorial surface has an inset plaque that shows EOT corrected time and includes declination lines for date shown by the shadow of the nodus on the polar gnomon wire. Dial sits on a granite block pedestal that shows cardinal directions.