be   white   or  red,    is  fortified,  sometimes
sweetened,   then    artificially    heated  to  a
temperature  around  120ºF/50ºC,     where   it’s
held     for     three   months  before  slowly  cooling
down     again.  It’s    then    aged    in  barrels     in  a
sherry-like solera   system  (below)     before
bottling.   There   are several different   styles  of
Madeira,    from    sweet   to  nearly  dry.
Styles  of  Port
Today    there   are     several     distinct    styles  of
port,   the most    common  of  which   are these:
Vintage port    is  made    from    the best
grapes  in  especially  good    years,  and is
barrel-aged for two years   and bottle-aged
unfiltered  for a   minimum of  10  years,
often   many    decades longer. It’s    dark    and
fruity, must    be  decanted    off its
considerable    sediment,   and must    be
drunk   within  a   few days    after   the bottle  is
opened.