Best workflow to upscale and restore this image for large format printing?

I have this image of a monastery (Hilandar) that looks like a painting/drawing. The current resolution is quite low, and I would like to restore it and upscale it significantly to print it in a large format.

Can Gemini (Advanced/Ultra) help with this kind of "image-to-image" restoration without hallucinating too many new details, or is it strictly for generation?

If not Gemini, what AI tools would you recommend for preserving the artistic style while increasing clarity and resolution?

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