I am offering on my site: http://augustuscoins.com/index.html an NGC graded XF slabbed Tiberius denarius, the so-called "Tribute Penny." See the page for photos of the slab and, of course, many other coins. It is almost Christmas. If any emperor is associated with Christ it is Constantine or Tiberius and this is probably the most famous type. This would make a great gift for your spouse to give to you for Christmas! (I have to buy for myself all my Christmas gifts that are more personal than shirts and socks!) [$449, reduced to $395 + $10 shipping in the US] I reorganized the ancient-coin literature on my literature page: http://augustuscoins.com/numislit.html so it will be easier for you to find items in your area of interest. Take a look if you like books and catalogs.