You know when your looking for something on the internet and
find something completely unrelated but more interesting.
That just happened to me, and it is related to buildings.

https://archive.org/details/buildingtechnologyheritagelibrary

Here is the closest I found to "modeling":

https://archive.org/details/ArchitecturalModels

Sorry for being so off-topic.

Jason

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Jason Glazer, P.E., GARD Analytics, 90.1 ECB chair
Admin for onebuilding.org building performance mailing lists