The Frauenkirche (Church of Our Lady) in Dresden was destroyed in the Allied bombings during World War II but recently rebuilt, down to every last baroque detail. Here's the website (too bad it's in German only but the photos are excellent). Here's a webcam. (I'm surprised they don't have the church lit up at night.) Article here. The dark stones (see photo) were salvaged from the rubble of the original church.
When it came time to duplicate the oak doors of the entrance, the builders had only vague descriptions of the detailed carving. Because people (especially wedding parties) often posed for photos outside the church doors, they issued an appeal for old photographs and the response—which included entire wedding albums—allowed artisans to recreate the original doors.