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 kilometres (31 mi) downstream as it reaches the Portuguese border. 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. The most important celebration in Zamora is the Holy Week.