"Cliff dwelling" is my term for a house that is (or could be) within 2 tiles of roads both on the plateau and in the lowlands, and is therefore next to a narrow rock ridge. My new Lugdunum has 52 grand insulae cliff dwellings. They are supplied food from markets on the plateau and supplied other goods from markets in the northern lowlands. Food distribution is simple, and all oil warehouses are fairly close to the "Road to Rome".
The city appears to be completely stable (except that changing demographics will eventually lead to worker shortages, although there is still unemployment after 5 years). No entertainment venues lack shows. Perhaps it isn't "world class" without massive sports facilities (it has no hippodrome and no colloseums), and I don't like that a village of 3 small casas on the western (farming) and central islands supplies labor to a lot of buildings, but it looks pretty good to me.
Designing the cliff dwellings was very tricky. After determining locations for the grand insulaes and nearby roads, four significant problems remained to be solved:
1) Furniture and oil have to be supplied to each house at least every 2 months. With lots of dead-end roads in the lowlands, this is hard to guarantee. I did a lot of trial-and-error with goods market placement and some with road layout.
2) Parts of the lowlands have little room, so in those places, most desirability enhancers (other than plazas) are on the plateaus. Oracles, with their long range, are a great help. (One large insulae would not evolve until a forum was replaced with a medium statue, but remains a grand insulae with the forum put back.)
3) With lots of dead-end roads on the plateau, it is difficult to cover them all with few service buildings. The houses don't have to be passed often, but each is covered by at least 2 food markets.
4) The plateau and nearby lowlands have limited space for many buildings. At one point I was desperate to squeeze in another farm, but eventually managed.
All of these problems interact. I redid about half of the plateau's road system after thinking that it was almost finished, and then redid some in the lowlands. This is not my usual planning style, and I don't recommend it.
A standard "loop" block of 28 small villas is in the east-central valley, fed from the farming island. It supplies labor access to all of the non-food industry (clay, pottery, furniture, wine, marble, iron, and weapons). Compared to the cliff dwellings, designing it was a breeze.
No salary was drawn or personal funds used. There was no debt after the "rescue" gift was taken. At hard difficulty, promotion occurred after 12 years. Results are:
Culture: 100
Prosperity: 100
Peace: 51
Favor: 75
Population: 5429
Funds: 57038
Continuing to govern, after 2.5 years the population stabilizes at 5590.
I submitted my new Lugdunum to the Downloads. Will cliff dwellings be useful in other cities?