Tortosa (Northwestern Catalan: [toɾˈtoza], Spanish: [toɾˈtosa] ) is the capital of the comarca of Baix Ebre, in Catalonia, Spain.
Tortosa is located at 12 metres (39 feet) above sea level, by the Ebro river, protected on its northern side by the mountains of the Cardó Massif, of which Buinaca, one of the highest peaks, is located within Tortosa's municipal boundary.
The Ebro (Spanish and Basque [ˈeβɾo] ; Catalan: Ebre, Western: [ˈeβɾe], Eastern: [ˈeβɾə]) is a river of the north and northeast of the Iberian Peninsula, in Spain. It rises in Cantabria and flows 930 kilometres (580 mi), almost entirely in an east-southeast direction. It flows into the Mediterranean Sea, forming a delta in the Terres de l'Ebre region, in southern Catalonia. In the Iberian peninsula, it ranks second in length after the Tagus and second in discharge volume, and drainage basin, after the Douro. It is the longest river entirely within Spain; the other two mentioned flow into Portugal.
The Ebro flows through many cities (Spanish: ciudades): Reinosa in Cantabria; Frías and Miranda de Ebro in Castile and León; Haro, Logroño, Calahorra, and Alfaro in La Rioja; Tudela in Navarre; Alagón, Utebo, and Zaragoza in Aragon; and Flix, Móra d'Ebre, Benifallet, Tivenys, Xerta, Aldover, Tortosa, and Amposta in the province of Tarragona (Catalonia).
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Xerta (Catalan pronunciation: [ˈtʃɛɾta]) is a town and municipality of the comarca of Baix Ebre. It has a population of 1,156 (register office, 2024) 
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It is established in a sharp bend to the right of the river Ebre, about 12 km upstream from the city of Tortosa in the province of Tarragona, Catalonia, Spain.
Aldover (Catalan pronunciation: [aldoˈβe]) is a municipality in the comarca of Baix Ebre, in the province of Tarragona, in Catalonia, Spain. It has a population of 880 (register office, 2024) .
There was a RENFE railway line from Tortosa to Alcañiz and Zaragoza that used to pass through this town until 1973. This line was dismantled as a result of a 1962 World Bank report advising the Spanish State to concentrate investment in the great lines and to abandon the less profitable railways connecting rural areas. Since the line was terminated, the rails were pulled off and the Aldover train station buildings lie abandoned.
Tarragona (Spanish: [taraˈɣona]; Catalan: [tərəˈɣonə]) is a province of eastern Spain, in the southern part of the autonomous community of Catalonia. It is bordered by the provinces of Castellón, Teruel, Zaragoza, Lleida and Barcelona and by the Mediterranean Sea.
The province's population is 795,902 (2018), about one fifth of whom live in the capital, Tarragona. Some of the larger cities and towns in Tarragona province include Reus, Salou, El Vendrell, Tortosa, Valls, Amposta. This province has 183 municipalities. The province includes several World Heritage Sites and is a popular tourist destination. There are Roman Catholic cathedrals in Tarragona and Tortosa.
The siege of Tortosa (1 July – 30 December 1148) was a military action of the Second Crusade (1147–49) in Spain. A multinational force under the command of Count Raymond Berengar IV of Barcelona besieged the city of Tortosa (Arabic Ṭurṭūsha), then a part of the Almoravid Emirate, for six months before the garrison surrendered.
The campaign originated in an agreement between Barcelona and the Italian city-state of Genoa in 1146, following a Genoese raid on Almoravid territory. At the same time, the Genoese also agreed to aid the Castilians in an expedition against Almoravid Almería. Papal approval, which connected the two Spanish endeavours to the call for a second crusade to the Holy Land, was obtained the next year. Participants in the siege of Tortosa were called "pilgrims" (peregrini), the same term used for those en route to the Holy Land.
Baix Ebre (Western Catalan: [ˈbaʃ ˈeβɾe], "Lower Ebro") is a comarca (county) on the coast in southern Catalonia. It is located in the region of Terres de l'Ebre, and its capital is Tortosa.