Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Puerto Rico

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San Juan Puerto Rico USA Vertical Dial 349
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.