The Head Office complex is comprised of four buildings, three of which were constructed in 1984 and the other in 1992. Architects: Estanislao Pérez Pita and Jerónimo Junquera. In April 1995, the selection committee and jury of the "III Bienal de Arquitectura Española 1993-94" ranked this building amongst the 28 best architectural works out of a selection of 426. Address: Paseo del Conde de los Gaitanes, 177. Alcobendas (Madrid) - Spain.