to的用法：Dwellings thought by archeologists to have housed religious shrines…

oria

Dwellings thought by archeologists to have housed religious shrines stand along a wide avenue that connects Durrington with Stonehenge.
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9 |0 F  F* S- W, k3 o! {整句话的意思能懂，但是这里的'to'是什么成分，有点搞不懂？是（thought by archeologists to)吗？

jonah_w

* \' G: S- e6 K; C; Vby archeologists 是插入语，可以删去。
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3 G0 k/ [7 o, M/ U- gby archeologists 这里等同于 do you think

to 是跟前面的thought相连的，
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pan

The author means to say,

The archeologists thought that these dwellings used to (or still, we don't know) house religious shrines. They (these dwellings) now stand along a wide avenue ...

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shadowfiend

thought by archeologists to have housed religious shrines整个做dwellings的后置定语，be thought to 相当于be considered to，是被认为的意思，by archeologists是个插入结构，这样分析下来整个句子就很好理解了吧。