Panthéon Paris History — From Church to Mausoleum
Five identity changes in a single century — and how the building still carries the marks of all of them
Few buildings in Europe have changed their identity as often as the Panthéon. Commissioned by Louis XV as a thanksgiving church for Saint Geneviève, completed during the Revolution, secularised by the National Constituent Assembly in 1791, returned to Catholic use during the Bourbon Restoration in 1816, re-secularised in 1830 by Louis-Philippe, designated a national basilica by Napoleon III in 1852, and definitively converted into a secular mausoleum by the Third Republic in 1881 — the building has been a church four times and a secular monument three times in just over a century. The architecture has absorbed all of it: the cross has been added and removed, the inscriptions have been changed and changed back, the crypt has filled with both religious and secular figures. This guide traces the five transitions and explains how each has left a visible mark on the building you visit today.
The royal vow and the commission — 1744 to 1790
The Panthéon began as a royal vow. In 1744, King Louis XV fell seriously ill at Metz during the War of the Austrian Succession and vowed that, if he recovered, he would replace the dilapidated medieval church of the Abbey of Sainte-Geneviève — patron saint of Paris — with a grander building. He recovered, and in 1755 the commission was given to Jacques-Germain Soufflot, an architect who had studied Roman antiquity at the French Academy in Rome and who proposed a Greek-cross plan with a colossal Corinthian portico and a triple-shelled dome that referenced both the ancient Pantheon and Saint Peter's. Construction began in 1758; the first stone was laid by the king himself.
Soufflot's design was structurally daring — slender piers carrying an enormous dome, a span that required reinforcement during construction and again in the nineteenth century — and he did not live to see it finished. He died in 1780, and the project was completed by his pupil Jean-Baptiste Rondelet, who supervised the closing of the dome and the finishing of the interior. The church of Sainte-Geneviève was substantially complete in 1790 — the year before the Revolution intervened. The building never functioned as the parish church Louis XV had imagined; by the time it was finished, the political order that commissioned it had already begun to dissolve.
The first secularisation — 1791
On 4 April 1791, the National Constituent Assembly voted to convert the freshly completed church of Sainte-Geneviève into a temple of the nation — a burial place for the distinguished citizens of revolutionary France. The decision was prompted by the death of the politician and orator Honoré Gabriel Riqueti, comte de Mirabeau, on 2 April; the Assembly resolved on the conversion within forty-eight hours of his death, and Mirabeau was interred there on 4 April. The cross was removed from the dome, the religious inscriptions on the pediment were replaced with the secular formulation Aux grands hommes la patrie reconnaissante (To the great men, the grateful homeland), and the building was renamed the Panthéon Français.
Mirabeau was joined by Voltaire in July 1791 (a national funeral with an estimated 100,000 mourners) and Jean-Jacques Rousseau in October 1794. Mirabeau himself was de-Panthéonised in 1794 after evidence emerged of secret correspondence with the king, and his remains were removed from the crypt — the first of several disinterments that would mark the Panthéon's volatile early decades. By the time the First Empire collapsed in 1814, the crypt held roughly forty figures, most of them generals and administrators of Napoleon's regime, and the political identity of the building was firmly bound to the revolutionary and imperial settlement.
The return to religion and the second secularisation — 1816 and 1830
The Bourbon Restoration brought immediate consequences for the Panthéon. In 1816, two years after the return of Louis XVIII, the building was re-consecrated as a Catholic church and rededicated to Saint Geneviève. The cross was restored to the dome, the secular inscription on the pediment was removed (although the actual stone carving was preserved beneath plaster), and most of the figures interred during the First Empire were quietly removed from the crypt by royalist authorities — including the mathematician Gaspard Monge, the chemist Claude Louis Berthollet, and several Bonapartist generals. The building functioned again as a parish church and place of pilgrimage to Saint Geneviève for the next fourteen years.
The July Revolution of 1830 brought the second secularisation. King Louis-Philippe, the Orléanist constitutional monarch installed by the revolutionary settlement, re-designated the building as a Panthéon by royal decree and restored the secular inscription Aux grands hommes la patrie reconnaissante to the pediment. The cross was not removed from the dome on this occasion — the constitutional monarchy stopped short of full anti-clerical symbolism — but the building's primary function was again declared secular. No major new Panthéonisations occurred during the July Monarchy (1830–1848), in part because the political consensus on who counted as a grand homme had fractured.
Napoleon III and the third return to religion — 1852
Louis-Napoléon Bonaparte's coup of December 1851 and the foundation of the Second Empire in 1852 produced the third return of the Panthéon to religious use. By imperial decree in 1852, the building was designated a national basilica and returned to the Catholic Church for liturgical use. The cross was reinforced on the dome, and the Foucault pendulum — which had been installed in March 1851 under the previous Republic — was removed and the original bob transferred to the Conservatoire des Arts et Métiers in 1855. The building functioned as a basilica throughout the Second Empire (1852–1870), although the period's only major interments were two figures of relatively minor public profile.
The fall of the Second Empire in September 1870 and the founding of the Third Republic did not immediately reverse the 1852 designation. The Paris Commune of 1871 briefly removed the cross from the dome and flew a red flag in its place, but the cross was restored after the Commune was suppressed. The building's status as a basilica persisted under the early Republic for another decade, even as the political climate increasingly favoured a secular reading of national identity. The decisive moment came not from a political programme but from a death.
Victor Hugo and the definitive secularisation — 1881 to 1885
On 26 May 1885, Victor Hugo died. The Third Republic was unwilling to bury its most celebrated literary figure in a Catholic basilica, and within days the National Assembly voted to permanently convert the Panthéon back into a secular mausoleum. The conversion was, in fact, the formalisation of a decree the Republic had already passed in 1881 — the secularisation had been legally enacted four years earlier, but no Panthéonisations had taken place under the new designation. Hugo's funeral, on 1 June 1885, drew an estimated two million mourners along the route from the Arc de Triomphe to the Panthéon and is generally considered the largest French state funeral of the nineteenth century. Hugo was the first interment under the Republic's permanent designation; the secular identity has held continuously since.
The building visitors enter today still carries the marks of all five transitions. The cross on the dome was removed for good in 1885, although the cruciform iconography on the interior — biblical figures in the dome frescoes by Antoine-Jean Gros, religious inscriptions in several side chapels — was preserved as historical fabric rather than removed. The pediment carries the 1791 secular inscription Aux grands hommes la patrie reconnaissante, exposed and re-carved after the 1885 conversion. The crypt holds a mixture of pre-1791 religious dedications and post-1885 secular interments, and the chapels at the east and west ends preserve the Catholic spatial logic of Soufflot's original design even though they are no longer used liturgically. The Panthéon is, in this sense, both buildings at once — the Catholic church Louis XV vowed in 1744 and the secular mausoleum the Third Republic chose in 1885.
Frequently asked
Who commissioned the Panthéon and why?
King Louis XV, in fulfilment of a vow made in 1744 during a serious illness at Metz. He vowed to replace the dilapidated medieval church of the Abbey of Sainte-Geneviève — patron saint of Paris — with a grander building if he recovered. The commission was given to Jacques-Germain Soufflot in 1755.
Who designed the Panthéon?
Jacques-Germain Soufflot, an architect trained in Roman antiquity at the French Academy in Rome. He died in 1780 before the building was finished. His pupil Jean-Baptiste Rondelet completed the dome and finished the interior; the building was substantially complete in 1790.
When did the Panthéon become a secular mausoleum?
First on 4 April 1791, by vote of the National Constituent Assembly. The designation was reversed in 1816, restored in 1830, reversed again in 1852, and made permanent in 1881 by decree of the Third Republic. Victor Hugo's interment in 1885 was the first under the permanent designation.
How many times has the Panthéon changed between church and secular building?
Five times in just over a century: secularised 1791, returned to religion 1816, secularised 1830, returned to religion 1852, secularised definitively 1881. The building has functioned as a church four times and a secular monument three times in its history.
Was the cross on the dome added and removed?
Yes — multiple times. It was removed at the first secularisation in 1791, restored in 1816, retained through 1830, briefly removed by the Paris Commune in 1871, restored after the Commune, and removed for the last time after the 1881 secularisation. A cross has not topped the dome since 1885.
Who was the first person buried in the Panthéon?
Honoré Gabriel Riqueti, comte de Mirabeau, on 4 April 1791 — the day the National Constituent Assembly voted to convert the church into a temple of the nation. Mirabeau was de-Panthéonised in 1794 after evidence of secret correspondence with the king emerged. Voltaire followed in July 1791.
Were figures ever removed from the crypt?
Yes. The Bourbon Restoration in 1816 ordered the removal of most figures interred during the First Empire, including the mathematician Gaspard Monge, the chemist Claude Louis Berthollet, and several Bonapartist generals. Mirabeau had already been disinterred in 1794. Monge was re-interred under the Third Republic.
Who painted the dome frescoes?
Antoine-Jean Gros painted the dome interior between 1811 and 1834, on the theme of The Apotheosis of Saint Genevieve. The frescoes were commissioned during the First Empire, modified during subsequent regime changes, and preserved as historical fabric after the 1885 secularisation rather than removed.
Why was Victor Hugo buried in the Panthéon?
His death on 26 May 1885 prompted the Third Republic to formalise the building's secular status — the legal designation had been enacted in 1881, but no Panthéonisations had occurred under the new identity. Hugo was the first interment under the permanent designation. His funeral drew an estimated two million mourners.
What traces of the religious past are still visible inside?
The dome frescoes by Gros depict The Apotheosis of Saint Genevieve, several side chapels preserve Catholic inscriptions, and the spatial logic of the Greek-cross plan reflects Soufflot's original ecclesiastical design. The pediment carries the 1791 secular inscription Aux grands hommes la patrie reconnaissante, restored after the 1885 conversion.