Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 577
State/Province:  Washington Country:  USA
Dial Type:  Gnomonic or Projection Dial Condition:  Good
  Latitude and Longitude: 47° 38.429' N  122° 18.146' W
  • Main lobby of Seattle Public Library
    2401 24th Avenue East
    Seattle, WA
  • A colored-aperture projection calendrical sundial with one functional and four decorative 18 inch round clear stained glass apertures. Markings on floor indicate positions of projected orange light spot at solar noon from the spring to fall equinox. An additional noon mark indicates opening date of library.
General Information:
  • Owner: Seattle Public Library
  • Designer: Rebecca Cummins and John Carmichael
  • Builder: Rebecca Cummins and contractors
  • Construction Date: August, 2006
Web Links:

Last Revised: 2019-07-31 21:39

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Sundial = Civil + EoT

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