In the book Outliers by Malcolm Gladwell, I came across this confusing sentence:
Facing the square is the Palazzo Marchesale, the palace of the Saggese family, once the great landowner of those parts.
I couldn't understand the sentence in terms of grammar because it seems to be reduced. But in reduced sentences, there are generally two sentences. Only one of them is reduced, because both sentences have the same subject. In my quoted sentence there is just one sentence? Could you explain this to me please?