In the northeast, only the remains of the tower and corbel, that is addorsed to the primitive military installations. This area is encircled by the castle bulwark, and radiates from this to include: walls and moats of the Bulwark of the Elvas Gate, with prismatic corbel and pyramidal cap; the Bulwark of Santo António and Bulwark of Espírito Santo, with similar corbels, along a wall that is interrupted by the "Rio" Gate and remains of the Bulwark of Clérgios, the medieval wall and modern remains of the Bulwark of Nossa Senhora da Luz.