Montjuïc Castle

Montjuïc Castle looks down on Barcelona from a wooded hill above the port — and for two centuries, it looked down on the city with cannons pointed at it, not out to sea. This is a fortress that turned its own guns on the people below it, and later became one of the primary killing grounds of Franco’s dictatorship.

A castle that shelled its own city

On 3 December 1842, General Espartero ordered Montjuïc’s cannons to open fire — not on an invading army, but on Barcelona itself, to crush a popular uprising below. Over twelve hours, the castle fired 1,014 rounds into its own city, killing at least twenty civilians and destroying buildings across the centre. It was a brutal proof of what the fortress had actually become: not a shield facing the sea, but a cage facing inward, built to control Barcelona rather than defend it. The 1843 bombardment that followed only confirmed it. From that point on, Montjuïc’s real enemy was never a foreign fleet — it was the city underneath it.

The 1896 trial that scandalised Europe

After a bomb exploded during Barcelona’s Corpus Christi procession in 1896, some 400 anarchists, trade unionists and suspected radicals were rounded up and taken to Montjuïc. Eighty-seven went to trial; five were executed by firing squad. What made the case infamous wasn’t the verdicts — it was the torture used to extract confessions, exposed by journalist Alejandro Lerroux’s newspaper campaign and picked up across Europe. The international outcry forced Madrid to back down, and most of the remaining prisoners were released by 1901. It was the first time Montjuïc’s reputation as a place where the truth got tortured out of people reached beyond Spain’s borders — it would not be the last.

Lluís Companys: the president shot at dawn

The castle’s darkest single act came on 15 October 1940. Lluís Companys, the democratically elected President of Catalonia, had fled to France after Franco’s victory — only to be captured by the Gestapo and handed over to Spanish authorities. After a court martial lasting under an hour, he was held in solitary confinement in the castle’s former chaplain’s quarters, then executed by firing squad in the Santa Eulàlia moat at six in the morning, reportedly kneeling with a crucifix in his hands. His death turned Montjuïc into a site of Catalan political martyrdom that still resonates today. The castle carried a physical reminder of that era for decades afterward too: a 2,000-kilogram angel statue from a monument to Franco’s fallen soldiers stood in the Santa Elena moat until 2023, when Barcelona’s city council finally removed it — the last Francoist monument left standing anywhere in the city.

The White Terror’s assembly line

Between 1939 and 1952, Montjuïc became a processing centre for what came to be called the White Terror. Military courts moved thousands of Republicans, Catalanists, trade unionists and intellectuals through trials that sometimes lasted minutes, sentences effectively decided before the hearing began. Roughly 250 people were executed here during the Civil War alone, out of nearly 1,500 held at the castle in that period; historians estimate close to 4,000 executions took place across Barcelona in the post-war repression, with Montjuïc as its principal stage. In 2018, restoration work in the castle’s cisterns and dungeons uncovered graffiti scratched into the walls by 19th-century prisoners — names, dates, fragments of protest, left by people whose only crime, in many cases, was who they were rather than what they’d done.

Getting there and what a visit actually feels like

Montjuïc Castle sits at the top of Montjuïc hill, reachable by cable car from Poble Sec or Montjuïc’s own funicular-plus-cable-car combination, or by a longer walk through the surrounding gardens. It is worth going in with the right expectations: the views over Barcelona and the Mediterranean are genuinely spectacular, but the exhibitions inside are deliberately unflinching about what happened here. Locals in Barcelona have historically had a complicated relationship with the hill above them for exactly that reason — it is a place people visit for the panorama and leave having learned something considerably heavier than they expected.

Frequently asked questions