Restoration, and construction in general, can sometimes be very simple. As long as one takes into account the common sense, based on knowledge of centuries, and looking after the reasons of some past decisions.
building with common sense
Caravaggio (1571 – 1610)
Building Lime has the property to become a pure mineral material again.
Lime ‘petrifies’, as anyone else who looks Medusa right into her eyes (Greek mythology).