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Excavated ruins of the semicircular cryptoporticus at Cercadilla, Córdoba's Roman palace, weathered sandstone vaults and column bases under overcast afternoon light, modern railway tracks visible behind a chain-link fence

Cercadilla: Córdoba's Roman Palace Bulldozed for a Train Station

Cercadilla was the only Roman palace of its kind ever found in Hispania — until construction of Córdoba's AVE station bulldozed most of it in 1991 and 1992.

Portrait of Sophie Marchand
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Art history background with eight years writing interpretive content on Córdoba's Caliphal heritage.

Updated Published
Roman Corduba206 BCE–572
Three days is how long it took construction machinery to destroy most of what remained of the only Roman palace of its kind ever found in Hispania[9], once bulldozers moved onto Cercadilla for Córdoba's new high-speed rail station on 20 May 1991.[1] The complex covered more than 80,000 square metres[2] and has been dated to 293–305 AD by an inscription in its baths naming two future emperors as junior Caesars.[3] Whether it was actually an imperial palace, or a bishop's basilica mistaken for one, is a dispute among archaeologists that has never been fully resolved.[4]
Roman Corduba206 BCE–572
Palace floor area
80,000 m²
Its size made it Hispania's most significant seat of power[2]
When it was built
293–305 AD
Dated by a bathhouse inscription naming two Caesars[3]
1992 demolition zone
500 × 200 m
Bulldozed in three days that May, per the dig's director[5]

In this article

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What is Cercadilla, and why is it called a palace

Cercadilla sits on the north-western edge of Córdoba's historic centre, in railway land that has been in industrial use since the nineteenth century. The first hint of what lay underneath surfaced in 1922, during routine work to expand the railway yard, when workers uncovered part of a vaulted underground gallery.[6] Nobody grasped what they had found at the time; the fragments went back into the ground, and the site stayed forgotten for decades.
What emerged from the 1991 dig was a palatial complex of unique design, covering more than 80,000 square metres and ranking as Hispania's most significant building linked to imperial power in its day[2]. It was organised around a cryptoporticus, a semicircular underground vaulted gallery 150 metres long, with a barrel vault four metres high and four and a half metres wide.[7] A design that requires an entire palace complex to be organised around a single underground gallery is not something a builder improvises; it argues for resources and ambition well beyond a routine provincial commission.
Arranged around an artificial terrace built above that gallery, the complex included:[8]
  • A great basilical hall
  • A small thermal (bath) complex
  • Two triclinia, or banquet halls
  • Two smaller basilical halls
  • Two polyabsidal halls
  • A probable nymphaeum
  • The imperial apartments
The Junta de Andalucía's own listing calls the building the only structure of its kind preserved anywhere in the territory once occupied by the Roman Empire, attributing it to the tetrarch emperor Maximian, said to have used it as his seat during a stay in Hispania in 296–297 AD.[9]
That framing matters, because so little Roman-era architecture in Córdoba survives above ground at all. Where the Roman Temple still stands as a fragment fused into the modern city centre, Cercadilla's galleries were never meant to be seen again once the tracks went in.

Was it really Maximian's palace

The date rests on solid epigraphic evidence. Baths within the complex yielded an inscription naming Constantius Chlorus and Galerius, the two junior Caesars appointed under the First Tetrarchy, which fixes construction to between 293 and 305 AD.[3] The Tetrarchy split imperial rule among four men, two senior emperors and two juniors, each answering for a different frontier; a residence of this scale at Córdoba, then a provincial capital rather than an imperial seat, says something about how much weight the western Mediterranean still carried at the end of the third century.
Whose residence it actually was is the harder question. Professor Ramón Corzo Sánchez and archaeologist Pedro Marfil argue the complex was never linked to Maximian at all, and was in fact commissioned by Bishop Ossius of Córdoba in honour of Saint Acisclus, the city's patron. Part of their case rests on construction technique: the building was laid out using an 80 cm measuring unit, one associated with Christian architecture of the period rather than imperial building projects.[4] Reading the stone rather than the guidebook is what leads to the disagreement in the first place — measurements, not myths, are what separate the two camps. The bishop in question has his own story in Hosius of Córdoba and the Council of Nicaea.
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The two readings may not be as far apart as they look. Whatever the complex was originally built as, it changed function fast: within a few years of Maximian's fall, the site appears to have passed into Christian religious use, a transition the archaeology traces in some detail. For a visitor today, the honest answer to "who built Cercadilla" is that no single answer has consensus; the tourist information may say Maximian, but the case for a bishop's monument to a martyred saint is taken seriously by working archaeologists, not dismissed as a fringe theory. Saint Acisclus also turns up in the Visigothic record: Isidore of Seville says King Agila I, who attacked Córdoba around 550-551 and was defeated there, profaned the saint's shrine.

Three days that erased a palace

Archaeologists had barely begun when construction caught up with them. Two campaigns of rescue excavation ran between May and August 1991, and then again from December 1991 to May 1992, racing to document a floor plan and an occupation history reaching back to the first century BCE before the machines arrived.[10]
The first race was lost quickly. Once crews moved onto the site to build Córdoba's new high-speed rail station on 20 May 1991, it took just three days for machinery to destroy almost everything that had been preserved in the area known as the playa de vías, the trackbed zone.[1] What actually stopped the bulldozers was a criminal complaint filed with the police, not any change in official policy.
The archaeologists on site did not wait for permission to act. Camino Fuertes, who would later become the site's director, and her colleagues took turns standing watch over the remains at night, afraid the machines would move back in once nobody was looking.[11] Whatever they salvaged in those eight months of fieldwork turned out to be most of what any future visitor would ever get to see.

A year of negotiation, then the machines came back

For about a year after the police complaint, the site sat in limbo while the Ministry of Public Works, the Junta de Andalucía's culture department, Córdoba's city council and the state rail operator RENFE argued over what to do with it. The urgency was not really about archaeology: Spain's first high-speed line was being built against the clock, ahead of Seville's Expo '92, and Cercadilla's ruins sat in exactly the wrong place to slow it down. Every technical report on record recommended against continuing to build over the site regardless. The decision that ended the argument was political rather than technical: construction resumed on 20 May 1992, in a zone that, according to one detailed academic account of the site, affected around 60% of the Roman palace's surface area.[12]
The second demolition was as fast as the first. Between 20 and 22 May 1992, crews cleared a strip 500 metres long and 200 metres wide, cutting through more than three metres of archaeological stratigraphy — layers running from the Roman period up through the Islamic city.[5]
Part of what made the resumed works possible was a fog of false claims. Camino Fuertes later counted at least five pieces of misinformation that circulated at the time:[13]
  • The high-speed line would skip Córdoba altogether because of the ruins
  • The site amounted to nothing more than "four stones"
  • The archaeologists were personally profiting from the dig
  • The remains would be built around rather than destroyed
  • The rail alignment itself would have to change
The story travelled well beyond Spain. The Times reported that Spain was about to demolish something on the scale of Buckingham Palace, a comparison Córdoba-based archaeologist Ana Zamorano would later recall with some bitterness.[14] The same rail line that ended the argument over Cercadilla would, within a few years, reshape how budget high-speed rail changed who visits Córdoba — a transformation nobody arguing over the ruins in 1992 could have anticipated.
“The destruction of the Roman building was "a brutal attack on the historical heritage and an oversimplified looting."[15]”
Camino Fuertes , archaeologist, Andalusian Agency for Cultural Institutions

From imperial hall to church and cemetery

Maximian's own claim on the building did not last long. He was forced to abdicate in 305 AD, and the complex appears to have passed into Christian religious use with unusual speed.[16] Archaeological evidence points to the northern triconch hall functioning as the Church of San Acisclo, dedicated to Córdoba's most important local martyr cult of late antiquity.[17]
A Christian necropolis grew up around the basilica and stayed in continuous use for centuries. Among the burials recovered is the tombstone of Bishop Lampadius, who served the diocese for seventeen years and five months before his death on 19 September 549.[18] None of that continuity is visible to a casual visitor today, but it is the reason archaeologists describe Cercadilla as a palimpsest as much as a palace.
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A 2007 study by the site's own excavation director added further layers to that picture: late-antique burials, an Emirate-era bathhouse, an aqueduct and Caliphal-period fountains, all sharing the same patch of ground the Romans had first built on.[19]

What's left, and can you visit it today

Not everything at Cercadilla was destroyed outright. Before the 1992 works resumed, conservators extracted a large water cistern (33 metres long and 3.6 metres wide) from the palace's service quarters and relocated it to the gardens of the Paseo de Córdoba, where it still stands today.[20]

2 of 8 ha

Only a fraction of the original site has ever been excavated and opened to the public.[2][21]
The excavated section of the site, a little over two hectares of the original eight, opened to the public between 2004 and 2015. It has been closed ever since, with no announced plan to reopen it.[21]

Before you go

Cercadilla is currently closed to visitors, with no confirmed reopening date. Check the Junta de Andalucía's cultural agenda before planning a stop here — the excavated remains are not accessible without notice.[22]
The Junta de Andalucía's own cultural agenda still lists Cercadilla as currently closed to the public, with admission free whenever it does reopen.[22] Whatever formal heritage protection covers the site today, it has not translated into a euro of maintenance budget or a fixed reopening date. For now, the Roman Bridge and the city's other Roman-era monuments remain the more reliable way to see what survives of Roman Córdoba above ground.

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Frequently asked questions

What is the Cercadilla archaeological site in Córdoba?
Cercadilla is the excavated remnant of a late-Roman palatial complex on the north-western edge of Córdoba, uncovered during construction of the city's AVE high-speed rail station in 1991. At more than 80,000 square metres, it ranked as Hispania's most significant building linked to imperial power at the time[2], organised around a 150-metre semicircular cryptoporticus.[7] Most of it was destroyed before excavation could be completed.

Why was the Roman palace at Cercadilla destroyed?
Córdoba's new high-speed rail station needed the land. Construction crews destroyed most of the site in just three days in May 1991[1]; after roughly a year of negotiation among government bodies, works resumed in May 1992 despite technical reports recommending against it, destroying a further 500-by-200-metre strip.[5] The decision was political, not technical.

Who built the Cercadilla palace — was it really Emperor Maximian?
Traditional attribution credits the tetrarch emperor Maximian, said to have used it as his seat during a stay in Hispania in 296–297 AD.[9] Not every specialist agrees: Professor Ramón Corzo Sánchez and archaeologist Pedro Marfil argue it was instead a religious complex built for Bishop Ossius of Córdoba, partly because of construction techniques associated with Christian rather than imperial architecture.[4]

Can you still visit the Cercadilla site today?
Not currently. The excavated portion, a little over two hectares of the original eight, was open to the public between 2004 and 2015.[21] The Junta de Andalucía's own cultural agenda lists it as closed to the public, with free admission whenever it does reopen.[22]

How much of the Cercadilla palace survives?
Reports vary depending on what is being measured. One detailed academic account puts the area affected by the 1992 station works at around 60% of the palace's surface[12]; other figures describe different zones or time periods. What is clear is that the majority of the original complex no longer exists.

What did archaeologists do to try to save Cercadilla in 1991-92?
They filed a criminal complaint that halted the first round of demolition and stood night watches over the remains, afraid machinery would move in unseen once nobody was looking.[11] Even so, at least five separate pieces of misinformation circulated publicly during the controversy, including claims that the ruins were "just four stones."[13]

Is Cercadilla connected to Córdoba's train station?
Yes. The archaeological site sits directly beneath and around the trackbed of Córdoba's AVE high-speed rail station, and it was the station's construction that triggered both the 1991 and 1992 demolitions.[1]

What happened to the palace after the Roman Empire fell?
After Maximian's forced abdication in 305 AD, the building appears to have been converted rapidly to Christian use. Its northern hall is thought to correspond to the Church of San Acisclo.[17] A necropolis grew up around it and stayed in use for centuries, with burials including that of Bishop Lampadius, who died in 549.[18]

Sources

22 references Show
  1. theconversation.com (opens in a new tab)

    “En tan solo tres días destruyeron casi todo el patrimonio arqueológico que se conservaba en el espacio ocupado por lo que se conoce como la "playa de vías".”

  2. theconversation.com (opens in a new tab)

    “sus dimensiones, más de 80 000 m², lo convertían en el edificio vinculado al poder más importante de la Hispania de ese momento.”

  3. theconversation.com (opens in a new tab)

    “Esta fecha tan concreta la sabemos gracias a la aparición de una inscripción, en las termas, en la se pueden leer los nombres –los cognomina– de dos emperadores: Constancio Cloro y Galerio, ambos nombrados como Césares.”

  4. Wikipedia — Palacio de Maximiano Hercúleo (opens in a new tab)

    “el profesor Ramón Corzo Sánchez y el arqueólogo Pedro Marfil creen que no se trata de un palacio ni tuvo nada que ver con el emperador, sino que se trató de un gran edificio mandado construir por el obispo Osio en honor de San Acisclo. Entre otras razones, se argumenta que el edificio está construido utilizándose una unidad de 80 cm, que es una medida de arqueología cristiana.”

  5. cordopolis.eldiario.es (opens in a new tab)

    “Entre el 20 de mayo y el 22 de mayo de 1992 se destruyeron 500 metros de longitud y 200 metros de anchura" y "más de tres metros de estratigrafía", relató Camino Fuerte.”

  6. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “Los primeros restos arqueológicos localizados fueron descubiertos en 1922 durante unas obras de ampliación de la playa de vías en la estación de Cercadilla.”

  7. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “estuvo organizado en torno a un criptopórtico de trazado semicircular de 150 metros de longitud con bóveda de cañón de cuatro metros de altura y cuatro y medio de anchura.”

  8. Junta de Andalucía (opens in a new tab)

    “una gran aula basilical, un pequeño conjunto termal, dos triclinia (salas de banquetes), dos aulas basilicales de pequeñas dimensiones, dos salas poliabsidadas, un posible ninfeo y los apartamentos imperiales.”

  9. Junta de Andalucía (opens in a new tab)

    “Este edificio es el único de estas características que se conserva en todo el territorio ocupado por el Imperio Romano. Está atribuido al emperador tetrarca Maximiano Herculeo (293-305) y fue su sede durante su estancia en Hispania (296 - 297 d. C)”

  10. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “Entre mayo y agosto de 1991 se inició la primera fase de excavación e identificación y, tras la relevancia del hallazgo, se produjo una nueva campaña entre diciembre de 1991 y mayo de 1992.”

  11. cordopolis.eldiario.es (opens in a new tab)

    “llegaron a vigilar por la noche el yacimiento por el miedo a que "entraran las máquinas" y lo destruyeran todo”

  12. theconversation.com (opens in a new tab)

    “Esa área afectaba a alrededor del 60 % de la superficie del palacio romano. Con todos los informes técnicos contrarios a la destrucción del yacimiento, se tomó la decisión política de continuar con las obras. El 20 de mayo de 1992 se reanudaron los trabajos de construcción de la estación.”

  13. cordopolis.eldiario.es (opens in a new tab)

    “que el AVE no iba a parar en Córdoba por el yacimiento, que Cercadilla eran cuatro piedras, que nos estábamos haciendo ricas las arqueólogas con el yacimiento, que los restos no se iban a destruir sino que se iban a integrar en la estación y que la recta ferroviaria iba a tener que cambiar su trazado.”

  14. cordopolis.eldiario.es (opens in a new tab)

    “The Times llegó a publicar que en España iban a destruir algo equivalente al Palacio de Buckingham”

  15. inspain.news (opens in a new tab)

    “Archaeologist Camino Fuertes of the Andalucian Agency for Cultural Institutions calls the destruction of the Roman building "a brutal attack on the historical heritage and an oversimplified looting".”

  16. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “Maximiano fue forzado a abdicar en 305, por lo que probablemente este edificio pasó a tener un uso religioso muy rápidamente”

  17. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “el aula de cabecera triconque ubicada al norte parece corresponder a la iglesia de San Acisclo, el centro de culto más relevante de la Córdoba tardoantigua y altomedieval.”

  18. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “El obispo Lampadio, que vivió en la religión cristiana 60 años, de los cuales 17 años y 5 meses los pasó como obispo. Falleció en paz el día 19 de septiembre del año 549.”

  19. academia.edu (opens in a new tab)

    “Inhumaciones tardoantiguas, un establecimiento de baños emiral, un acueducto y unas fuentes califales completan la imagen urbana de este área de la ciudad.”

  20. Wikipedia — Yacimiento arqueológico de Cercadilla (opens in a new tab)

    “se decidió la extracción de los restos de este elemento arquitectónico y su traslado al lugar que hoy ocupa en los jardines del paseo de Córdoba. Se trata de una cisterna de grandes dimensiones (33 m de longitud por 3,6 m de anchura).”

  21. theconversation.com (opens in a new tab)

    “Más de dos hectáreas fueron puestas en valor y abiertas a la visita entre los años 2004-2015. A partir de 2015 el yacimiento se cerró al público y desde entonces no ha habido interés ni en volverlo a abrir, ni en conservar los vestigios arqueológicos expuestos”

  22. Junta de Andalucía (opens in a new tab)

    “Actualmente cerrado al público Precio Gratuito”