Zamora (Spanish pronunciation: [θaˈmoɾa]) is a city in Castile and León, Spain, the capital of the province of Zamora. It lies on a rocky hill in the northwest, near the frontier with Portugal and crossed by the Duero river, which is some 50 km downstream as it reaches the Portuguese frontier. With its 24 characteristic Romanesque style churches of the 12th and 13th centuries it has been called a "museum of Romanesque art". Zamora is the city with the most Romanesque churches in all of Europe.
After the Roman victory over the Lusitanian hero Viriathus the settlement was named by the Romans, Occelum Durii or Ocellodurum (literally, "Eye of the Duero"). During Roman rule it was in the hands of the Vaccaei, and was incorporated into the Roman province of Hispania Tarraconensis. It was on the road from Emerita (modern Mérida) to Asturica Augusta (modern Astorga). (Ant. Itin. pp. 434, 439). Two coins from the reign of the Visigothic king, Sisebuto, show that it was known at the time as "Semure". During the period of Moorish rule the settlement became known by the names of "Semurah" or "Azemur". After the establishment of the Christian Kingdom of Asturias, the settlement became a strategic frontier post and was the scene of many fierce military engagements between the Muslims and Christians. Control of the town shifted between the two sides a number of times from the early eighth century to the late eleventh centuriy. During this period it became heavily fortified. Henry IV granted Zamora the epithet of "most noble and most loyal city". Dome of the Cathedral Romanesque entrance to the Cathedral (12th century) San Vicente Church The most notable historic episode in Zamora was the assassination outside the city walls of the king Sancho II of Castile in 1072. Some decades before, king Ferdinand I of León had divided his kingdoms between his three sons. To his daughter, Doña Urraca, he had bequeathed the "well fortified city of Zamora" (or "la bien cercada" in Spanish). All three sons warred among themselves, till the ultimate winner, Sancho, was left victorious. Zamora, under his sister who was allied with Leonese nobles, resisted. Sancho II of Castile, assisted by El Cid, lay siege to Zamora. King Sancho II was murdered by a duplicitous noble of Zamora, Bellido Dolfos, who tricked the king into a private meeting. After the death of Sancho, Castile reverted to his deposed brother Alfonso VI of León. The event was commemorated by the Portillo de la Traición (Treason Gate). Zamora was also the scene of fierce fighting in the fifteenth century, during the conflict between the supporters of Isabella the Catholic and Juana la Beltraneja. The Spanish proverb, No se ganó Zamora en una hora, literally, Zamora wasn't won in an hour, is a reference to these battles. It is the Spanish equivalent of the English proverb "Rome wasn't built in a day." During the 12th century, the city was extraordinarily important for its strategic position in the wars between the Kingdom of León and Arabs to conquer the Iberian Peninsula. As a result, the city preserves many churches and buildings from that time. In the next centuries, the city lost its political and economic relevance and suffered emigration, especially to South America (where many other cities called Zamora were founded).