a) A central entryway was constructed as an underground visitor's center covered by a contemporary glass pyramid.
b) A new restaurant complex was constructed in the central court, embraced by the Renaissance and Baroque wings.
c) A new wing was constructed with translucent white marble, adding a contemporary structure to complement the Renaissance, Baroque, and Neoclassical styles of the older wings.
d) The original medieval wall of the fortress was covered by a new exhibition space.