Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Arizona

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Oro Valley Arizona USA Analemmatic Dial 871
This analemmatic sundial is painted on concrete. It is similar to John Carmichael's human sundial at Flandrau Planetarium at the University of Arizona. The orange background was painted by hand with acrylic paint on top of the blue acrylic court surface. Lettering and other markings were painted with Rustoleum spray enamel using stencils from Final touch up painting was done by hand. It took a three man team ten days to paint. It's quarter hour time marks are longitude corrected and shows Standard Time when readings are adjusted using the Equation of Time. It includes a central Date Line for standing, using monthly and weekly marks. There is a Solar Noon mark, and Bailey Points to indicate the direction of sunrise and sunset.
Oro Valley Arizona USA Combination Dial 713
A massive, 24 foot tall combination almost-vertical and calendrical dial facing southwest so that northeast bound traffic can easily view the dial. The 13 foot diameter vertical ring dial of welded, zinc-coated steel declines 45? west and reclines 12? from vertical. The 3 inch diameter, 20 foot long polar-pointing gnomon tube is supported in space by a 10 inch diameter support tube with a cone nodus on the bottom end. The vertical dial shows longitude-corrected MST with hour and half-hour marks and Arabic numerals on the outer stainless steel chapter ring. The calendrical dial solar noon line is a bronze plaque atop a triangular, fin-shaped concrete pedestal and inclined at the latitude angle, allowing the equinox mark to be in the center of the date line with the indicating shadow cast by the cone nodus on the bottom of the gnomon support tube. Other significant dates indicated include the solstices, date of dial dedication, date of Oro Valley incorporation and the date of Arizona statehood. As of July, 2012 the date line of the calendrical dial remains fully designed but incomplete and uninstalled so this portion of the dial is not functional. Dialist John Carmichael reports this is the most difficult and complex project he has designed. The dial base is a modern sculpture of welded steel plates by artist Jon Seeman. This 10,600 pound monumental dial was three years in design and fabrication.
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.
Ottawa Ontario Canada Horizontal Dial 10
A bronze 12 inch diameter horizontal dial with hour lines from 4 AM to 8 PM and engraved Roman hour numerals and compass rose. This restoration was donated by Thomas Ritchie who remembered from his youth that the original dial was accidentally destroyed during the construction of the Parliament Library in 1872. The restored dial was unveiled May 19, 1921 by the Governor General, Sir Victor Cavendish, Duke of Devonshire.Dial sits atop light granite pillar approximately 18 inches diameter and 40 inches high.
Ottawa Ontario Canada Horizontal Dial 827
This sundial is a memorial for W T Macoun. The dial is a simple bronze horizontal sundial, about 12 inches in diameter. It shows solar time with hour lines from 4 am to 8 pm. Hour marks are Roman numerals. The design accounts for the thick gnomon. The stone octagonal base is about 40 inches high
Ottawa Ontario Canada Horizontal Dial 833
A garden variety round horizontal sundial about 12 inches in diameter. It looks like a bronze casting with iron staining from steel bolts. Hours marks only from VI to VI (6 am to 6 pm). The dial is located in a very shaded spot close to a building and surrounded by trees. Ornamental. Dial plate has inscription "Tempus Omnia Revelat" (Time Reveals All).
Ottawa Ontario Canada Vertical Dial 127
Two vertical declining dials declining 58.1? west and 31.9? east on adjacent sides of the south corner of the Sisters of Charity of Ottawa Mother House. The western dial is approximately 7x8 feet and the eastern dial is approximately 7x4 feet. The dials are of gray plaster with black painted iron gnomons. The dials decline 58.1? west of south and 31.9? east of south. The western dial has hour lines from 10 AM to 7 PM and the eastern dial has hour lines from 7 AM to 3 PM. These dials predate the use of time zones and show local solar time. Mayall on p. 229; erroneously described this dial as on Mint Tower. LAMIRANDE, E., Elisabeth Bruyere, Foundress of Sisters of Charity of Ottawa, Ottawa, 1995, p. 207, "In the course of the same winter, Fr. Allard had built a double sundial of great dimension on the southwest angle of the house (corner of Bolton and Sussex streets) which, even today, continues to give the correct time, as it did in Mr. Bruyere's time; she greatly appreciated the convenience. The work presupposed an advanced knowledge of mathematics and astronomy. It was the first of its kind in Canada."
Ottawa Ontario Canada Hemisphere Dial 449
This hemispherium dial is a dramatic modern sculpture. The 32 inch quarter hemisphere is carved into the edge of a 40 inch cube of dark granite tilted to conform to its latitude of 45.5° , and set upon a rough concrete pedestal of slightly smaller dimension. The gnomon is a
Ottawa Ontario Canada Calendrical Dial 739
A projection calendrical dial that illuminates the headstone of the Unknown Soldier on Remembrance Day, November 11 at 11:00 AM, commemorating the end of World War I. Remembrance Day is celebrated on the 11th hour of the 11th day of the 11th month of each year. The east-west axis extends to the Peace Tower, while the north-south axis parallels the path of the sun across the building on November 11. The concrete walls, grooved with large offset rectangles, are reminiscent of the rows of white grave markers in Allied war cemeteries. The headstone of the Unknown Soldier is the lone artifact, a simple bench the only furniture in Memorial Hall.
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.
Oxford Ohio USA Armillary Dial 103
A 6 foot armillary sphere on a marble column. The armillary has equatorial, meridional, polar and equatorial rings, plus two smaller ones at the poles. Along the outside of the equatorial ring are golden figures, marking the houses of the zodiac. On the inside of the equatorial ring are Roman numerals marking the hours. The armillary was a gift to the university on its 50th anniversary by the Miami chapter of Delta Delta Delta. Dial sits atop a marble column.
Palisades New York USA Equatorial Dial 410
An equatorial dial in bronze. Has analemma at the noon hour mark. Lamont-Doherty Sundial Fountain.
Palm Beach Florida USA Horizontal Dial 637
A bronze horizontal dial approximately 24 inches square on a painted masonry pedestal. Inner hour circle shows Arabic numerals for standard time and outer hour circle shows Roman numerals for local time. Dial face includes cardinal direction marks and coordinates. An EOT table is provided in an adjacent bronze plaque atop the pedestal. Dial is located on the entrance walkway to the Flagler Museum, formerly known as Whitehall, Henry Flagler's private home. Museum is open to the public but requires an entry fee.
Palo Alto California USA Horizontal Dial 900
This horizontal bronze dial is 14.5 inches in diameter, mounted on a fluted pedestal. The gnomon angle is set for the latitude and is 5 5/8 inches tall. Graceful hour lines extend from 5am to 7pm marked by Roman numerals. It is delineated only with half-hour lines. Surrounding the dial face is a zig-zag decoration.
Palo Alto California USA Vertical Dial 482
A vertical declining dial approximately 45 x 55 inches. Made of aluminum and brass. Shows the hours from 8 am to 5 pm using analemmas. Analemmas are bounded by the summer and winter solstices and a straight line through them shows the equinox. Daylight time is shown using Roman numerals, with standard time shown in Arabic. In keeping with the motto, a simple equation is written on the dial face, d/dt is not equal 0. Designer Ronald Bracewell used an oculus, a disk with a central hole, standing 8 cm in front of the dial face. The disk casts a shadow with a bright sunlight dot to indicate both time and season. Hour lines include longitude correction. This has been relocated; it was previously hanging free below a south facing wall, facing the Terman Engineering Building. Dial is now located on the wall of a covered walkway area.
Palo Pinto Texas USA Horizontal Dial 890
The 21 inches in diameter sundial started as a sculpture. A call went out to the boy and girl scouts (and alum men and women) to contributed fossils, and other artifacts. This included an arrowhead found at camp. These objects were incorporated into the finished wax, with the arrowhead embedded on the style edge at the very tip of the gnomon. A mold was taken of the completed sculpture and used to create a casting wax replica of the sculpture.
Palos Verdes Estates California USA Armillary Dial 740
A 1.5 meter diameter bronze armillary sphere atop a beige stone pedestal at the center of a 9 meter diameter pond or fountain. The Armillary includes meridian, equatorial and horizon rings as well as Arctic and Antarctic circles. The equatorial ring is perforated with Roman hour numerals and Zodiacal symbols. The central gnomon rod has a ball at the north end and an arrow tail at the south end.
Paramus New Jersey USA Horizontal Dial 331
A ground level horizontal dial constructed from a rim of ten interlocking concrete pieces each 33 inches long. The interior is filled with an irregular concrete pieces whose edges form the hour and half-hour lines. The gnomon is iron, 51 inches from base to tip of style. The gnomon interior has a bronze statuette in the shape of a griffin taken from George Washington's coat of arms. The dial was stolen and replaced in early 1980's.
Park City Kentucky USA Horizontal Dial 314
A beautiful horizontal dial 25 inches in diameter with a 9 inch gnomon. Has hour and half hour lines from 5 am to 7pm with 10 minute marks. South of the gnomon is an intricately engraved Great Seal of The United States of America. The dial is of Coconino sandstone and sits on a brick surround.
Parma Ohio USA Armillary Dial 580
A three foot armillary sundial with equatorial ring and gnomon pointer on a stone base with dedication plaque. Dial was built by the local high school vocational welding class in 1988.