The Salón de los Embajadores is located on the site of the Pleiades Hall of the Al-Mubarak palace in Al-Mutamid. King Pedro I ordered the construction, to the master Diego Ruiz in 1427, of a qubba-shaped building with a square floor and a wonderful hemispherical, also called half orange, dome. As in all the rooms, Arab and Christian motifs are eclectically conjugated on inscriptions in Arabic and phylacteries with evangelical psalms in Latin, wooden balconies, marble columns, horseshoe arches, tiles, plasterwork, atauriques, etc. Visitors may consider interesting too, the late sixteenth – century portraits by Diego Esquivel where the kings up to Felipe III appear in chronological order.
However, the element that stands out the most is the half orange dome, which is to the Mudejar what the Sistine Chapel to the Renaissance. It is a beautiful dome made with a ten lefe loop, considered in carpentry the most perfect lacework layout, of which there are only three others in the world that are located in the Casa de Pilatos (also in Seville), in the Convent of San Francisco de Lima (Peru) and in the National Archaeological Museum (which comes from the Altamira Palace, in Torrijos).
In order for an officer carpenter to obtain the geometric grade, the highest grade in the carpentry trade, a construction with a ten lefe loop was required as the most complex work to be made. The ten lefe loop defines the type of wheels that make up the vault, a type of layout where all the wheels have ten arms and generate a weave that intertwine infinitely, unlike in other developments where bare wheels appear. This waste of power in an architectural state generates a visual sensation of geometric perfection that continues surprising all visitors today.