How art made the world

I've been watching "How art made the world" on PBS. One of the episodes
dealt with Stonehenge. Apparently they found a tomb there containing the
largest collection of burial artifacts in Europe, including two identical
gold pieces. The narrator, Dr.Nigel Spivey, claims that the occupant
of the tomb was from continental Europe, must have made his way to the
British Isles, impressed the natives with his gold pieces and directed
the building of Stonehenge, which became his tomb. Not a word was said
about Stonehenge being an observatory.

I can imagine that someone showing up with artifacts reflecting advanced
metallurgical technology might also possess advanced knowledge (for the
time) of astronomy and the construction of observatories. But I would feel
more comfortable about that possibility if the narrator had explicitly
mentioned that Stonehenge was an observatory.

Does anyone know of reputable discussions of tombs at Stonehenge that take
due account of the fact that it was an observatory?

I'm enjoying the series, How Art Made the World, and find some of its
topics quite startling. On the other hand, I have no way to evaluate the
conclusions that are reached about them. This treatment of Stonehenge,
which I imagine I know something about, offers one possible way to form
an opinion about the series.
--
Ignorantly,
Allan Adler
* Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and
* comments do not reflect in any way on MIT. Also, I am nowhere near Boston.