Located at the corner of the Tower of Beverello, between the northern side and the eastern side, facing the sea, the large room (26 m x 28 m) is covered by an octagonal vault resting on large angular ébrasement and equipped with sixteen ogive forming a star pattern with a bright oculus in the center. Around the dome there are small windows that served soldiers to watch over the person of the king when he received visits or ambassadors. Access to this position of the hall was possible through the helical scale ("Catalan staircase") in piperno and in tuff stone, located in the adjacent Tower of Beverello and also built by Guillem Sagrera, during the works that affected the whole royal environment. The floor of the room was decorated with Maiolica white and blue glazed, brought from Valencia.