The 500 metres of the sentry walk around the ramparts are entirely open to visitors for the very first time.
The walk offers a number of different viewpoints, most never seen before, of the Castle - the buildings, courtyard and moat - and the city: the LU tower and the old course of the Loire, which bathed the Castle walls until the in-fillings of the 1930s; the Cathedral; the mediaeval Bouffay quarter; the Brittany Tower...