Its 2,500-meter long city wall is almost completely intact.
The King immediately started building a great stone wall around Avila to protect his latest conquest from further attacks.
The job was supervised by his brother-in-law, Raymond of Burgundy, who was a legendary figure himself.
Protruding out from the walls are eighty-eight semi-circular defensive towers, placed at uniform intervals.
The walls are punctured by eight (or nine?)
Originally, there was a moat and a barbican outside the walls, but they no longer exist.
The massive fortification was completed in less than a decade.
Today it is possible to walk upon the walls for roughly half their circumference.
