 The whole complex, from a Spanish architecture stance, is one of the first examples of and most representative, to be built in the centre of Madrid, with its Neoplateresque façade and Baroque Salamanca evocations.The building was designed by the young Spanish architects Antonio Palacios and Joaquín Otamendi through a municipal competition to be the headquarters for the Society of Post and Telegraph of Spain.Palacios and Otamendi were also the consultants for the Bilbao Bridge, Madrid Casino and the San Sebastian Bridge.