Adriano, by the now defunct OPTI Castcraft Foundry:

http://www.findmyfont.com/index.php/fonts/font-preview?fset=OPTI-Castcra...

OPTI was famous for “appropriating” their designs from others—does anyone know if this typeface is a clone of another typeface? The OPTI archive site claims that Adriano is based on Aeterna, but that doesn’t seem to be a match....

EDIT—Aeterna AKA Jost Mediaeval discussed here:
http://typophile.com/node/107102