It  was in  Roman   times   that    wooden  casks
—   an  innovation  of  northern    Europe  —
arrived along   the Mediterranean   as  an
alternative to  clay    amphoras.   During
subsequent  centuries,  they    became  the
standard    wine    vessel, and amphoras
disappeared.    Casks   had the advantage   of  being
lighter and less    fragile,    but the disadvantage
of  not being   airtight.   This    meant   that    wines
could   only    be  stored  in  them    for a   handful of
years   before  they    became  overoxidized    and
unpleasant  to  drink.  Excellent   aged    wines
therefore   disappeared along   with    the amphora,
and only    reappeared  after   more    than    a
thousand    years   with    the invention   of  the cork-
stoppered   bottle  (p. 724).
The Spread  of  Winemaking  in  Europe; the
Rise    of  France  After   the fall    of  Rome    around
the  5th     century    CE,  Christian   monasteries
advanced     the     arts    of  viticulture     and
winemaking  in  Europe. Local   rulers  endowed
