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Stonehenge’s precise purpose may have been lost in the mists of time but, in relatively modern times, its alignment with the sun was not noted until 1740 when William Stukeley wrote that, ‘the Avenue… answers, as we have said before, to the principal line of the whole work, the north-east, whereabouts the sun rises, when the days are longest.’ It is still a matter of debate whether the primary purpose of the monument was to trace the trajectory of the sun at the solstices. While larger crowds are drawn to observing the sunrise at the summer solstice, the prospect of better weather may have something to do with it, the position of the sun is most accurately aligned to Stonehenge’s tallest Trilothon - the technical term for two vertical stones with a horizontal one atop - when the sun sets on the midwinter solstice. Here in Britain, the most famous, but by no means the only, structure that tracks the sun at the solstice is the stone circles at Stonehenge. The sun is so important for life on this planet that it is no surprise that man has long been in awe of it, worshipped it and plotted its trajectory.
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I left in awe at the astronomical knowledge and mathematical precision that must have gone into constructing and positioning the gnomon to pull off such an illusion. If I had not seen it with my own eyes, I would have not believed it. Precisely at noon the shadow cast by the gnomon which was on the western quadrant will suddenly appear on the eastern, as if it had passed through the brick wall. My recommendation is that you visit it just before midday because you will see something truly spectacular. Country Life's Top 100 architects, builders, designers and gardeners.
![When does summer start](https://loka.nahovitsyn.com/210.jpg)