Modern Spain began to take form during the Reconquista, the struggle between the Christian kingdoms arising in the northern regions left unconquered by the Moors and the Muslim kingdoms into which Al-Andalus eventually split.
Roman Catholicism is, by far, the most popular religion in the country, with four in five Spaniards (80%) self-identifying as Catholics. The next group (one in eight, or 12%) is represented by atheists or agnostics. Minority religions account for one in seventy (1.4%) of all Spaniards.
Until 1714, Spain was a loose confederation of kingdoms and statelets, under the same king, until King Philip V removed the autonomous status of the Aragonese crown. Moreover, the creation of a unified state in the 19th and 20th centuries has lead to the present situation, apparently simple, but sometimes extremely confusing. During the Second Spanish Republic (1931-1936), the Basque and Catalan were given limited self-government, which was lost after the Spanish Civil War (1936-1939) and restored in 1978 during the transition to democracy.
The Castilian-derived Spanish (called both Español and Castellano in the language itself) is the official language throughout Spain, but other regional languages are also spoken. Without mentioning them by name, the Spanish Constitution recognizes the possibility of regional languages being coofficial in their respective autonomous communities.
Spain was part of the Roman Empire and many areas of Spain retain significant Roman architectural remnants. The Roman aqueduct at Segovia is still in use as of 2004; Mérida, now the Extermaduran capital but once the capital of the Roman province of Lusitania, retains over 5 miles of its Roman aqueduct, Roman bridge over the River Guadiana, an arch of Trajan, and significant remnants of a Roman forum, amphitheatre, and a temple popularly accounted to have been dedicated to Diana (goddess). Another Roman bridge crosses the Tagus River at Alcántara. Lesser Roman ruins can be found in the heart of Barcelona.
The 20th century initially brought little peace; colonisation of Western Sahara, Spanish Morocco and Equatorial Guinea was attempted as a substitute for the loss of the Americas. A period of dictatorial rule (1923-1931) ended with the establishment of the Second Spanish Republic. The Republic offered political autonomy to the Basque Country and Catalonia and gave voting rights to women. However, with increasing political polarisation and pressure from all sides, coupled with growing and unchecked political violence, the Republic ended with the outbreak of the Spanish Civil War in July 1936. Following the victory of the nationalist forces in 1939, General Francisco Franco ruled a nation exhausted politically and economically until his death in 1975.
In order to understand the political forces and debates in Spain we have to consider two dimensions: the Right vs. Left dimension and the Nation State vs. Plurinational State dimension. The political parties agendas and the individual citizens opinions can only understood when situated on both dimensions. The Constitution of the Kingdom of Spain states that 1) it is a Nation and 2) that it is formed by Nationalities and Regions. This statement is a contradiction (since Nationality and Nation essentially mean the same thing in political theory), but it was an agreement that struck a balance between the political parties advocating the nation state and those advocating the plurinational state. The territorial organization of Spain into Autonomous Communities of Spain is the administrative realization of this constitutional balancing act.
The most well-known variety of Spanish folk music is likely flamenco, a diverse genre created by Andalusian Roma. Flamenco is known since at least the 1770s, and has been through several cycles of dwindling popularity and rebirth. The style has produced many of the most famous Spanish musicians, including singer Camarón de la Isla and guitarist Carlos Montoya. Outside of flamenco, regional Spanish folk music includes the distinct Basque trikitrixa and accordion music, Galician and Asturian gaita (bagpipe) and Aragonese jota. Though some folk traditions have died out or are moribund, some retain great popularity and have been modernized and adapted to new instruments, styles and formats. These include the popular Celtic music of Galicia, the singer-songwriter tradition of nova canço and New Flamenco.
The original peoples of the Iberian peninsula (in the sense that they are not known to have come from elsewhere), consisting of a number of separate tribes, are given the generic name of Iberians. This may have included the Basques, the only pre-Celtic people in Iberia surviving to the present day as a separate ethnic group. The most important culture of this period is that of the city of Tartessos. Beginning in the 9th century BC, Celtic tribes entered the Iberian peninsula through the Pyrenees and settled throughout the peninsula, becoming the Celt-Iberians.
As the Roman empire declined, the Suebi, Vandals and Alans each took control of part of Hispania. In the 5th century AD the Visigoths, a romanized germanic tribe, conquered all of Hispania and established a relatively stable kingdom lasting until 711, when it fell to an invasion by Islamic North African Moors and became part of the expanding Umayyad empire, under the name of Al-Andalus. When the Umayyad empire gave way to the Abbaside empire, an Umayyad exile established the Caliphate of Cordoba, effectively making Al-Andalus independent from the empire.