Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 538
State/Province:  Yucatan Country:  Mexico
Dial Type:  Equatorial Dial Condition:  Age worn
  Latitude and Longitude: 20° 58.000' N  89° 37.000' W
  • On the roof of the Merida Cathedral
  • Generally identified as an equatorial, this stone cylindrical cavity dial uses the extremities of the semicircular dial plate as two independent styles. The dial face is marked with six equally-spaced hour lines with minor subdivisions. The east style casts the 6 AM to noon shadow while the west style casts the noon to 6 PM shadow. No construction date is give but is likely 18th century or earlier.
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Sundial = Civil + EoT

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