Sundials - World's Oldest Clocks

North American Sundial Society


Sundial: 523
State/Province:  Massachusetts Country:  USA
Dial Type:  Henge Condition:  Excellent
  Latitude:   42° 22.000' N Longitude: 72° 31.000' W
  • University of Massachusetts west of main campus near stadium and field off Rocky Hill Road
  • On the fields of U-Mass is a replica of an American Indian sun-wheel. A circle 130 feet in diameter has 14 major stones weighing 56 tons, 12 minor stones, and 4 flat stones at the center. 2 major stones mark the N and S cardinal points; a pair of portal stones mark the E and W points allowing an uninterrupted view of sunrise and sunset at the equinoxes; 4 stones mark sunrise and sunset at the solstices; and 4 more stones mark the extreme northern and southern positions of moonrise and moonset. Guided presentations can be arranged by calling 413-545-4311.
General Information:
  • Owner: Univ. Mass
  • Designer: Dr. Judith S. Young
  • Builder: Dr. Judith S. Young. Major stones from Chester Granite Co., East Otis MA
  • Construction Date: Nov 6-9, 2000
  • Support provided by the Healey Endowment at U-Mass, and grants from NASA and NSF and private donations