How to rebuild Notre Dame? 
The point is not to modernize the burnt icon (we hope), but to stabilize the building, then construct it as was done in the 12th century.
And as luck would have it, there's a team of stonemasons, carpenters, and craftsman that has spent 20 years creating the castle of Guédelon just south of Paris, using only 13th century methods. They know exactly what to do, as this Los Angeles Times story describes. 

Speaking of the 12th century, that's the approximate date of the world's oldest chess set - the Lewis Chessmen - made in Norway. Its 93 pieces were carved from walrus and whale ivory, enough for four sets, though some pieces are missing.
Enter the grandchild of an antiques dealer who bought this old chess piece 55 years ago and left it knocking around in a drawer. The family called Sotheby's, and now this frowning, stoic warden, or rook, will go up for auction July 2. He's expected to fetch up to one million dollars!


Make money by recreating ancient beers. Viking Beer. Mount Vernon porter the way George Washington would have enjoyed it.
Wait, this is a career choice? Curses! I was born too early!
College professor Travis Rupp creates ancient ales for Avery Brewing in Colorado. Libations with suggestive names like "Beersheba." You can see him in this CBS video, in case you're too sloshed to read.