Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Ohio

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Columbus Ohio USA Sculpture Dial 357
"Hora Novem" An unusual 'solar calendar water sculpture' incorporating water jets which converge at center of a 17ft equatorial ring.
Columbus Indiana USA Horizontal Dial 674
A 10 foot diameter horizontal dial of concrete, stainless steel and brick. The gnomon is a massive concrete structure and the Arabic hour markers are inset in the concrete dial face, which serves as a bench.
Columbus Indiana USA Vertical Dial 675
An approximately 10 x12 foot brick and stainless steel south-facing dial atop a 50 foot tower. This resembles an actual vertical dial but has a horizontal gnomon rather than a polar-pointing gnomon. The hour lines verify against ZW2000 software calculated angles for a due south dial but are non-functional with a horizontal gnomon. Dial face includes hour lines for 6 AM to 2 PM but no numerals. It's more sculpture than sundial.
Columbus Ohio USA Equatorial Dial 681
A cast bronze equatorial dial with inscribed analemma EOT figures on each hour line. Equatorial ring is a spherical segment. Arabic numerals mark Standard Time. Gnomon is missing. Dial sits atop a fluted Roman column on square base.
Colwood British Columbia Canada Horizontal Dial 656
A 12 inch octagonal stone horizontal dial with Roman hour numerals. Dial face depicts sun rays radiating from a central Beau Soleil to the hour numerals and outer time scale, which displays 5 minute graduations. This historic dial dates from the original Pendray House on the Havenwood, built in 1928. The dial was in poor condition and the gnomon was missing. In July, 2009, NASS member Roger Bailey cleaned the dial, highlighted the markings and fabricated and installed a new brass gnomon. The property is now Essencia at Esquimalt Lagoon, a private resort community but with public access for community activities. A stone path and arch lead to the dial, nearly overshadowed by a large tulip tree.
Concord New Hampshire USA Horizontal Dial 300
A 16 inch diameter cast bronze horizontal dial with 7 inch high cast and machined bronze gnomon. Dial face shows hour, half-hour and quarter-hour lines and Roman hour numerals 5 AM to 7 PM. The hour lines are corrected for longitude but no EOT correction is shown.
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.
Council Bluffs Iowa USA Vertical Gnomon Dial 479
Vertical gnomon casting its shadow onto a plaza in front of the city library. Modernistic design. This dial has been scheduled for removal as of October, 2010 due to cracking and to make more green space.
Cove Oregon USA Abstract Sculpture Dial 141
An unusual sun sculpture 5 foot tall and approximately 20 inches in width and depth. Has hour and minute markings arranged on horizontal members. A 1/4 inch steel rod functions as the gnomon. The dial is set to read Pacific Daylight Solar Time, with a stated accuracy of 15 seconds of time.
Cranford New Jersey USA Horizontal Dial 797
A 15 foot diameter horizontal dial with 5 foot high welded stainless steel plate gnomon. The dial face is elevated 18 inches by a white marble-faced platform above a 50 foot diameter concrete plaza that includes inset stainless steel hour line extensions. The dial face is rimmed with Bluestone and has elevated stainless steel hour lines for 4 am to 8 pm and elevated three inch stainless steel Arabic hour numerals. Cardinal directions are marked with elevated 6 inch stainless steel letters.
Crestwood Missouri USA Analemmatic Dial 526
This is a colorful analemmatic sundial 18 feet 6 inches overall diameter built of colored concrete. It is located on the grounds of a private elementary school in an area designated as a Sundial Garden. The sundial is surrounded by elevated flower planter boxes. The E-W markers are 10 feet apart and the date line is marked. The dial face shows the cardinal directions and phases of the moon. Viewing can be arranged by contacting Long Elementary School M-F 8:30 AM-3:15 PM.
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.
Cuencame Durango Mexico Vertical Dial 489
This vertical dial is 2m tall by 1.2 m wide and sits atop a quarried column nearly 7 m high. The gnomon on each face is approximately 60 cm long, and 16-19 mm in diameter. Each face has Roman numerals to indicate apparent solar time from 6am to 6pm. Alpha and Omega Greek letters. A carved cross at the twelve hour line. Inscribed "1904"
Culver City California USA Equatorial Dial 536
Located near the edge of a hill in Culver Park, this dial commands a fine view of the surrounding communities. The equatorial dial face is a six foot diameter, six inch thick brass ring supported by a 24 foot long steel gnomon six inches in diameter. The gnomon is anchored in a concrete oval-shaped base covered with tile and mosaics. The base and three surrounding water-drop shape ovals are inscribed with the word "Time" in the 12 languages spoken in Culver City. Ballona Creek, visible from the sundial, once provided transportation, food and recreation for a thriving native American population and later for Spanish-origin ranch owners. The dial north face has the 1:00 hour line at the bottom for Daylight Savings Time while the south face has the 12:00 hour line at the bottom for standard time. A bronze plaque states time is read from the center of the gnomon shadow and briefly discusses the equation of time. The dial is not longitude corrected and indicates local apparent time.
Dallas Texas USA Horizontal Dial 385
Horizontal dial approximately 20 feet in diameter. The gnomon is stainless steel and the dial face is of ceramic tile. Has Hour markers for both standard and daylight saving time, and an Equation of Time table. Large panels also describe significant makers and inventions in Texas Instrument's history. Global map of the earth as viewed from the north pole. Inscription provides some sundial history.
Danvers Massachusetts USA Vertical Dial 42
An east- declining vertical wood dial above the main doorway of the Rebecca Nurse House. Rebecca Nurse was a victim of the Salem witch trials in 1692. The House was restored in 1909 and it is believed this dial was added at that time; there is no evidence the house originally had a sundial.
Danville Vermont USA Vertical Dial 879
A simple vertical dial created on the front brick wall of the high school. There are no hour lines, but large Roman numerals are placed from 10am to 5pm to delineate the hours using Daylight Saving Time (where the 1pm hour is on the vertical). The gnomon is a simple rod.
Dartmouth Massachusetts USA Vertical Dial 163
1820 Federal style building owned by the Univ. of Mass. at Dartmouth. Referred to as the Sundial building because of a vertical dial over the main entrance.
Dayton Ohio USA Horizontal Dial 102
A circular granite dial about 2 feet in diameter. Has an ornate, solid gnomon that looks nearly top heavy for the dial. The dial sits on a sculpted column with spreading base. Protected by brass railing that surrounds the dial in a quadrilateral monument.
De Dedo Guam USA Analemmatic Dial 480
This analemmatic dial approximately 10 x 20 feet set into concrete. At the low latitude of Guam, the gnomon standing spot extends outside to ellipse of hour markers. Between April and September the shadows are very short near the noon hour and are difficult to read.