Who made the houses.
The Library's register of the people behind the houses. Admission follows a single criterion — the person created or remade a model of luxury hospitality that others then reproduced. Title, wealth and visibility admit no one. The nine groups follow the model, never the era: the axis is whose capital and whose authorship. All 287 entries carry a permanent LHL-P code; 260 carry a full article. The Part IX overview sets out the structure and the stories.