That 500yr old mosque has already survived previous earthquakes, so it makes sense that it survives this one too. Not all of the buildings that old survived – hence why there are so few older buildings still standing.
Modern buildings are often built cheaply. As long as it’s ‘good enough’ to survive as long as it’s likely to be needed, that’ll do.
Old buildings had fewer options and less finely calculated costs. They were built out of the best people could find, in the hopes it would last forever.
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