Consider this sentence:

In the house were a teapot and platter that had once belonged to Danielle's grandfather, which he brought when he emigrated.

Now can anyone tell me why "in the house" isn't the subject and why "a teapot and platter" is the subject? I know that "in the house" is an adverbial phrase, so does it mean that adverbial phrases cán't be the subject of a sentence?
The best way of explaining it is to switching word order: A teapot and platter were in the house.

I'm guessing that the word order in the original is such so that the modification can take place a little more easily. Even then, as it turns out, there is too much modification for one sentence.
Well i'm didn't understand about the modification part but i already knew the reconstruction part and my question for the first sentence involved only the part from "In the house...platter".

So does that mean that the adverbial phrase "in the house" can never be the subject and also i would like to know whether it is and/or can be the object?