Almost all of the mainly well-known sightseer areas are to be found in the core of the conurbation counting Puerta del Sol, Plaza Mayor, Palacio Real, and Plaza de Colón. The ethnicity of Madrid was subjugated by its Royal history, centre of the Spanish realm. The Royal Palace, huge places and buildings used by the Spanish realm, massive cathedrals and churches are copious in Madrid, as well as medieval building, even though nowadays Madrid is just as much a cosmopolitan conurbation of new architecture, lifestyle and civilization.