Complex sentence: The church was partially demolished, but the rest of the buildings served for some time as a factory and later passed into the possession of the de Stacpoole family, to be turned to domestic uses.
Split into simpler sentences: The church was allowed to fall into ruins, but the rest of the buildings served for some time as a factory. Later on they passed into the possession of the de Stacpoole family, and were turned to domestic uses.