Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 208
State/Province:  District of Columbia Country:  USA
Dial Type:  Horizontal Condition:  
  Latitude:   38° 54' N Longitude: 77° 04' W
  • South end of 30th St. NW, a few feet from the Potomac River
  • Large, ground level horizontal dial 16 ft. in diameter with 49 in high stepped hollow painted-green metal gnomon that is 5 ft 16 in long. Roman hour numerals with hour lines from 4:30 AM to 9:30 PM. Gnomon structure recalls the much larger Indian observatory dials. An appropriate poetic passage, once bolted to the gnomon, has disappeared.
General Information:
  • Owner:
  • Designer:
  • Builder:
  • Construction Date: ca 1985
  • Geo. McDowell, Twelve Sundials of Washington, nr. 10