Agree. We don't need to have ONE template on ALL images, we can (and should) have a number of templates
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If a bot knows that Information_Louvre->source is equivalent to Information->Author it can happily work with any of them being present.
But wouldn't it be smarter to split {{Information Louvre}} into {{Information}} and {{Louvre}}, and use as many of the fields in Information as possible and put additional data into the louvre template. This way even a dumb bot could harvest some data from the image page (without knowledge about tons of special purpose templates).