What’s interesting is that the leveraging of designs has really been going on since the 1950s. Prior to that, each building was designed and built from the ground up. Looking at the Temples, one can see a similarity in each era of Temple building.
There was a time that each Church building, Meetinghouse, Stake Center and Temple was a unique structure, and, in many cases, very distinctive. For a while now, in order to save money, the Church has been using standard plans for its buildings. Caveat alert: Once you get outside of North America, all bets are off on building design. They seem to be more unique, even the newer ones.
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