Sundials - World's Oldest Clocks

North American Sundial Society

San Juan  

Sundial: 349
State/Province:  Puerto Rico Country:  USA
Dial Type:  Vertical Dial Condition:  Good
  Latitude and Longitude: 18° 27.844' N  66° 7.163' W
  • La Fortaleza (The Fortress); the dial is located in front of the Governor's Official Residence from Spanish Colonial Era
  • A round pillar supports a rock cube with vertical dials on all four faces. This is one of the oldest in the Americas, erected by the Spanish around 1645 during the rule of Fernando de la Riva y Aguero. The vertical dial cube was crowned with a weather vane on top. This sundial was the first to be installed in the Antilles and was probably the second sundial to be placed in the New World.
General Information:
  • Owner: Puerto Rico
  • Designer: Spanish
  • Builder:
  • Construction Date: circa 1645

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