But are not we just going to get the same list as in the T/C Planning "Category"?
By the way surely Saltaire should be in that Category too?
But I don't think that Shibam should be - I have no evidence that it was "planned" and, if the concept means anything there must be some over-arching scheme/concept - not something which grew organically which surely Shibam did.
Morelia (originally "Valladolid") in Mexico would seem to meet the Category criterion - as I understand it Philip II sent very definite instructions as to EXACTLY how cities were to be designed/built in the New world and that Morelia was the result.
Quote from the Web which conforms the notices scattered around Morelia's "Centro Historico"
"....Its harmoniously composed center is reminiscent of Vicenza or Edinburgh's New Town. In the 16th century, King Philip II of Spain issued Las Ordenenzas, a set of urban-planning ordinances regarding the layout of Hispanic American cities. According to these rules, each city should feature a main plaza bordered by four streets (Morelia, unusually, has two main plazas); the buildings facing the plaza should include ground-ﬂoor portals, arched semipublic spaces linking the buildings to the street."
I quite like the idea of a connection for Idealistic town designs -an alternative might be to reconsider whether the Category is at too "low" a level. But I can't immediately see an alterntive category for many of them - it does describe why they were inscribed.