The summer solstice has long been marked by cultures worldwide.
See photos how people across the world celebrate the summer solstice.
Now a new study says the structure was linked to the summer solstice-and may have been a symbolic shield against darkness.
They also cut an avenue that was oriented with surprising accuracy to the rising of the sun on the summer solstice.
British Dictionary definitions for summer solstice
the time at which the sun is at its northernmost point in the sky (southernmost point in the S hemisphere), appearing at noon at its highest altitude above the horizon. It occurs about June 21 (December 22 in the S hemisphere)
(astronomy) the point on the celestial sphere, opposite the winter solstice, at which the ecliptic is furthest north from the celestial equator. Right ascension: 6 hours; declination: 23.5°