The Castle District of Buda is the ancient kernel of Budapest.
All that surrounds it was once only suburbs.
From whatever direction you reach the Castle District, you cross the ramparts which completely encircles the Castle Hill.
The whole area within the ramparts is protected as an ancient monument and part of the World Heritage preserves:
the lines of the streets and the foundations and architectural remains of the buildings
all retain the atmosphere and memories of the medieval and eighteenth
and nineteenth-century capital.