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Quick answer
They describe types of building. In the Institut d'Estudis Catalans dictionary, alcàsser (alcázar) is a fortified building that served as the residence of a king or prince, alcassaba (alcazaba) a fortified enclosure inside a walled town, mesquita (mezquita) a building where the Muslim community gathers and prays, seu a bishop's seat and also a cathedral church, llotja (lonja) a public place where merchants meet, and mirador a place in a building from which you can look into the distance. The word does not identify the place: Seville's Real Alcázar and Segovia's Alcázar are separate monuments run by separate bodies, and Málaga's Alcazaba, the Alhambra's Alcazaba and Mérida's Alcazaba are three different sites.
The short answer
These words name kinds of building, and many Spanish monuments carry one as part of their name. The Institut d'Estudis Catalans dictionary, which defines the Catalan forms, gives the core meanings.[1]
- Alcázar (Catalan alcàsser): a fortified building that served as the residence of a king or prince.[1]
- Alcazaba (alcassaba): a fortified enclosure inside a walled town, to shelter the inhabitants and the army.[1]
- Mezquita (mesquita): a building where the Muslim community gathers, above all for prayer.[1]
- Seu: the seat of a power or authority, especially a bishop's, and also a cathedral church.[1]
- Lonja (llotja): among other senses, a public place where merchants meet to do business.[1]
- Mirador: a place in a building from which you can look into the distance.[1]
What the word does not do is identify a place. The alcázars and alcazabas named below are each run by a different body, and their own pages show how far apart same-named buildings can be.
The Real Academia Española's Castilian definitions are not quoted here, because XTOUR has not verified them.
| Word | Dictionary sense (IEC) | Example named on its operator's site |
|---|---|---|
| Alcázar | Fortified royal residence | Real Alcázar de Sevilla; Alcázar de Segovia |
| Alcazaba | Fortified enclosure inside a walled town | Alcazaba of Málaga; Alcazaba of the Alhambra; Alcazaba of Mérida |
| Mezquita | Building for Muslim gathering and prayer | Mezquita-Catedral de Córdoba |
| Seu | A bishop's seat; a cathedral church | Barcelona Cathedral, on the Pla de la Seu |
| Lonja | A merchants' exchange | Lonja de la Seda, Valencia |
| Mirador | A lookout place in a building | Mirador de Lindaraja (Daraxa), Alhambra |
Alcázar: a fortress that was also a residence
The Alcázar of Segovia's own history explains the word through its first records. Between 1124 and 1139, it says, documents begin to call the building "castillo de Segovia" and "Alcaçar", a term that alludes to its condition as both fortress and royal residence.[2] That double meaning is the dictionary's too.[1]
Two buildings called Alcázar show how differently the word has aged.
Seville. The Real Alcázar's history begins with the Dar al-Imara, a new seat of government that Caliph Abd al-Rahman III ordered in 913, and says the Castilian conquest of 1248-49 gave the complex the status it keeps today: seat of the Crown and of the city's municipal power.[3] Its institutional page lists a governing council whose president, by statute, is the Mayor of Seville, and an official still titled Alcaide.[4] The royal use is not only history. Patrimonio Nacional says the Cuarto Alto, the palace's upper apartments, has been and still is the official residence of the King and Queen of Spain when they visit Seville; its use is assigned to Patrimonio Nacional, while visits to it are managed by the Alcázar's Patronato.[5] For the visit itself, see the Real Alcázar or the cathedral.
Segovia. The Alcázar of Segovia's site describes a different afterlife: the Royal College of Artillery from 1764 until a fire on 6 March 1862 destroyed its roofs and interior, the Archivo General Militar on the first floor since 1898, and a Patronato created by a decree of 18 January 1951 whose mission includes a public "Museo del Alcázar de Segovia".[2] Segovia is not in Madrid, and XTOUR does not treat it as part of the Madrid destination.
The two are separate monuments with separate operators and separate histories. A search for "the Alcázar" can return either.
Alcazaba: a fortified enclosure, sometimes with a palace inside
Málaga's Alcazaba explains its name directly: al-Qasba, its history page says, "comes to mean urban fortress". The same page describes a building that changed role, first a fortification, then a palace-fortress and seat of the city's government, and under the Nasrid rulers "two fortresses, one inside the other".[6] A protected walled path, the Coracha, linked it to the Castillo de Gibralfaro on the hill above.[7]
Granada's is different in kind. The Patronato de la Alhambra y Generalife says its entrance shows it was a military enclosure, but that, unlike the open Plaza de Armas of a typical medieval fortress, the Alhambra's Alcazaba was an enclosure within a larger one: a residential area for the elite garrison serving the Sultan, watching over the palatine city, laid out like a small town with houses for the guard.[8] Málaga's own page draws the link: its dungeons, it says, are identical to those of the Alcazaba of the Alhambra, though smaller.[7]
Mérida has a third. The Consorcio that runs Mérida's monuments says an inscription over the main gate dates its alcazaba to 835, built first to protect Muslim rulers from revolts by the city's population and to command the bridge over the Guadiana.[10]
XTOUR's reading of the three pages is that the dictionary's "fortified enclosure" fits all of them, while the palace inside is a matter of each site's history. In Granada, "the Alcazaba" is one part of the Alhambra; in Málaga it is a monument in its own right. See the Alhambra's tickets and timed entry for how the Patronato sells the Alcazaba as part of a visit.
Mezquita, and the mezquita aljama
The Córdoba cathedral chapter's site turns the Castilian Mezquita-Catedral into Mosque-Cathedral in English, and the IEC dictionary defines the Catalan mesquita as a building for Muslim gathering and prayer.[1][11] The form that matters on heritage signs is "mezquita aljama". Málaga's Alcazaba history uses it for the mosque ordered inside the fortress in the 8th century, "mezquita aljama o de los viernes", which served the city until a new great mosque was built in the 9th century.[6] Seville's Real Alcázar places its city's mezquita aljama at today's Colegiata del Salvador.[3]
In Córdoba the word survives in the building's own name. The cathedral chapter's English site calls it the Mosque-Cathedral Monumental Site and the mosque begun by Abd al-Rahman I the "Aljama Mosque".[11] What the building is today, and how it is run, are covered in the Mosque-Cathedral of Córdoba: one building, two histories.
Seu: a bishop's seat, and the cathedral
Seu is a Catalan word, and the IEC dictionary gives it two related meanings: the seat of an authority, especially a bishop's, and a cathedral church, with the example "la seu de Barcelona".[1] Barcelona Cathedral's own website, which calls the building the Catedral Basílica Metropolitana de Barcelona, uses the word that way, inviting readers to get to know "our Seu", and gives its address as Pla de la Seu.[12]
The dictionary also lists seu as the seat or headquarters of an organisation.[1] XTOUR's reading is that context decides: on a heritage sign in a Catalan-speaking city, La Seu is the cathedral. XTOUR has not verified how Palma's cathedral names itself on its own website, so this article does not describe it.
Lonja (llotja): a merchants' exchange
The IEC entry for llotja has three senses: a box in a theatre, an open-sided part of a building with pillars or columns, and a public place where merchants meet to trade.[1] Heritage lonjas are the third kind.
Valencia's Lonja de la Seda, the Silk Exchange, is one example. The Comunitat Valenciana tourism site describes it as Valencian Gothic architecture, built in the late 15th century as the centre of the city's silk trade, with a Sala de Contratación (the trading hall), a central tower holding a chapel and a prison for merchants who could not pay, and the hall of the Consulado del Mar; it says UNESCO listed the building in 1996.[13]
Mirador: a place to look out from
The dictionary's mirador is a place in a building from which you can look into the distance.[1] The Alhambra has a clear example. The Patronato explains that the Mirador de Lindaraja, also written Daraxa, takes its name from the Arabic al-'Ayn Dar Aisa, "the eyes of the house of Aisa"; in Nasrid times it was a lookout open to the landscape, with windows set very low so that people seated on the floor could see out.[9]
XTOUR has no verified source for Granada's open-air viewpoints that also carry the name, so it does not describe them.
What the words do not tell you
A shared word is not a shared operator, ticket or place. Seville's Real Alcázar is run by a Patronato whose governing council is presided over by the city's mayor, with its upper apartments assigned to Patrimonio Nacional, while Segovia's Alcázar is run by its own Patronato.[2][5][4] The Alhambra's Alcazaba is part of a monument run by the Patronato de la Alhambra y Generalife, and Málaga's is presented on the City of Málaga's own monument website.[6][8]
XTOUR does not state opening times, prices or entry rules for any building named here. For the cities, see Seville, Granada, Córdoba, Málaga, Barcelona and Valencia, or the Spain country page.
Sources & references
- [1]Institut d'Estudis Catalans, Diccionari de la llengua catalana (DIEC2), entries alcàsser ('fortified building that served as the residence of a king or prince'), alcassaba ('fortified enclosure inside a walled town, to shelter the inhabitants and the army'), mesquita ('building for the gathering of the Muslim community and, above all, for prayer'), seu² (seat or centre of a power or authority, especially of a bishop or the pope; also 'cathedral church', example 'la seu de Barcelona'), llotja (a box in a theatre; an open-sided part of a building with pillars or columns; a public place where merchants meet to do business) and mirador¹ ('place in a building from which one can look into the distance'); entry texts retrieved through the dictionary's own result pages. Read 2026-10-09
- [2]Alcázar de Segovia (Patronato del Alcázar de Segovia), official website, history section: a Roman fortification is 'probable' (granite ashlars like the Aqueduct's found); between 1124 and 1139 documents record 'castillo de Segovia' and 'Alcaçar', a term alluding to its condition as fortress and royal residence; Alfonso X held Cortes there in 1256; Royal College of Artillery installed 16 May 1764 until the fire of 6 March 1862; Archivo General Militar on the first floor since 1898 and still there; Patronato created by Decree of 18 January 1951. Read 2026-10-09
- [3]Real Alcázar de Sevilla (Patronato del Real Alcázar y Casa Consistorial de Sevilla), 'Historia del Real Alcázar' (signed text by Rafael Valencia): Caliph Abd al-Rahman III ordered a new seat of government, the Dar al-Imara, in 913; before that the Umayyad seat of power was near the city's mezquita aljama, located at today's Colegiata del Salvador; the Castilian conquest of 1248-49 gave the Real Alcázar the status it keeps today, seat of the Crown and of the city's municipal power; Pedro I's Mudéjar palace in the mid-14th century. Read 2026-10-09
- [4]Real Alcázar de Sevilla, 'La Institución': lists an Alcaide and a managing director, and a governing council (Consejo Rector) whose president, by statute, is the Mayor of Seville. Read 2026-10-09
- [5]Patrimonio Nacional (patrimonionacional.es), 'Cuarto Alto de los Reales Alcázares de Sevilla' page (page data embedded in the HTML): the Cuarto Alto 'ha sido y es actualmente la residencia oficial de los reyes de España cuando visitan Sevilla'; its use is assigned to Patrimonio Nacional; rooms include the official or audience chamber, King Pedro's bedroom, the Catholic Monarchs' mirador and oratory; visits to the Cuarto Alto are managed by the Patronato del Real Alcázar de Sevilla. Read 2026-10-09
- [6]Alcazaba y Castillo de Gibralfaro (Ayuntamiento de Málaga), 'Historia' of the Alcazaba: the name al-Qasba 'comes to mean urban fortress'; built first as a fortification and later a palace-fortress and seat of the city's government; first recorded in the time of Abd al-Rahman I (755), when a mezquita aljama 'o de los viernes' was ordered inside it, serving until a new great mosque was built in the 9th century; under the Nasrids 'two fortresses one inside the other'; occupied by civilian housing from the 18th century and restored from 1933; a Roman theatre built in the 1st century on the western slope of Gibralfaro. Read 2026-10-09
- [7]Alcazaba y Castillo de Gibralfaro (Ayuntamiento de Málaga), '¿Sabías que?': the Coracha, a protected walled path linking the palace-fortress of the Alcazaba with Gibralfaro Castle, built under Yusuf I around 1340; Roman marble shafts and Corinthian capitals reused at the Puerta de las Columnas; the Alcazaba's dungeons described as identical to those in the Alcazaba of the Alhambra, though smaller. Read 2026-10-09
- [8]Patronato de la Alhambra y Generalife, 'Alcazaba' place page: its access shows its character as a military enclosure; the area inside the walls is what medieval fortresses call the Plaza de Armas, normally an open space with almost no buildings, but the Alhambra's Alcazaba, as an enclosure integrated into a larger one, was a residential area for the elite garrison serving the Sultan, watching over the palatine city; today known as the Barrio Castrense, 'a small town' with houses of the guard, some with their families. Read 2026-10-09
- [9]Patronato de la Alhambra y Generalife, 'Mirador de Daraxa' place page: the mirador of Lindaraja, a Castilian adaptation of al-'Ayn Dar Aisa, 'the eyes of the house of Aisa', was in Nasrid times a lookout open to the landscape with a low garden before it; its windows are set very low so that people seated on the floor could see out; probably the most courtly room of the Palace of the Lions. Read 2026-10-09
- [10]Consorcio Ciudad Monumental de Mérida, 'Alcazaba' monument page: according to an inscription over its main gate, inaugurated in 835, first to protect Muslim rulers and subjects from revolts of Mérida's population and to command the bridge over the Guadiana; almost square perimeter of about 550 metres with 25 towers; an aljibe (cistern) survives, above which stood a small mosque. Read 2026-10-09
- [11]Mezquita-Catedral de Córdoba (Cabildo Catedral), English history page 'The history': Abd al-Rahman I, first emir of al-Andalus from 756, built the Aljama Mosque after Muslim worship had first taken place in the old basilica of San Vicente; enlargements by Abd al-Rahman II, al-Hakam II and Almanzor; the site calls itself the 'Mosque-Cathedral Monumental Site of Cordoba'. Read 2026-10-09
- [12]Catedral Basílica Metropolitana de Barcelona, official website (catedralbcn.org), home page in Catalan: the website of the 'Catedral Basílica Metropolitana de Barcelona', the first church of the archdiocese, 'will bring you closer to our Seu'; address Pla de la Seu s/n. Read 2026-10-09
- [13]Comunitat Valenciana regional tourism website, 'Lonja de la Seda' (English page): known in English as the Silk Exchange; a masterpiece of Valencian Gothic architecture, built in the late 15th century as the centre of the silk trade; Sala de Contratación with eight columns; Torreón Central with the chapel and a prison for merchants who could not pay their dues; Consulado del Mar; Patio de los Naranjos; listed by UNESCO in 1996. Read 2026-10-09
Frequently asked questions
Good to know
Does "Real" in Real Alcázar mean the building is still a royal palace?
In Seville, in part. Patrimonio Nacional's page for the Cuarto Alto, the upper apartments of the Real Alcázar of Seville, says they have been and still are the official residence of the King and Queen of Spain when they visit Seville, that their use is assigned to Patrimonio Nacional, and that visits to them are managed by the Patronato del Real Alcázar. The Alcázar's own history page says the Castilian conquest of 1248-49 gave it the status it keeps today, seat of the Crown and of the city's municipal power. Segovia's Alcázar, also called Real on its own site, is run by a Patronato created by a decree of 18 January 1951, and its site describes a later history as an artillery college and military archive; XTOUR has no source describing it as a royal residence today.
What is a mezquita aljama?
According to the history page of Málaga's Alcazaba, the mosque ordered built inside the fortress in the 8th century served as the city's "mezquita aljama o de los viernes", its congregational or Friday mosque, until a new great mosque was built in the 9th century. The Mosque-Cathedral of Córdoba's English history pages call the mosque begun by Abd al-Rahman I the "Aljama Mosque".