History of our collections

The School's collections have a somewhat complex history. We will try to explain it to you.

From the 18th-century cabinet of curiosities...

Extrait du Guides des amateurs et étrangers voyageurs à Paris, par Thiéry, 1789
Excerpt from Guide des amateurs et des étrangers voyageurs à Paris (Guide for amateurs and foreigners traveling in Paris), by Thiery, 1789

In a draft article for Thiery's Guide des amateurs et des étrangers voyageurs à Paris at the end of the 18th century, Pierre Charles Lesage, an inspector at the School, wrote: "École des ponts et chaussées brings together in its premises three valuable collections deserving the attention of foreigners, artists, and amateurs alike: the first [...] the deposit of road plans [and] construction projects [...]; the second [...] the cabinet of models and machines [...], independently of [...] about 350 drawings under glass made by the students; the third, a library chosen for the use of the students to facilitate their instruction”. In a few words, Lesage describes the essence of the School's collections, the close link between the production of students, that of engineers and the material that documents or serves their achievements.



The archives and library of the Corps and School

Ex libris de Lesage
Ex libris de Lesage

Since 1747, within the Bureau des Dessinateurs du Roi and under the direction of Jean Rodolphe Perronet, several activities were grouped together: management of the Ponts et chaussées repository, the surveying and drawing of the roads of France, the training of future engineers and, from 1763, the administration of Ponts et chaussées, when Perronet became First Engineer to the King. It is easy to see why, through him, we find archives of these different origins in the collections of the School, at least until his death in 1794. Alongside the archives, a collection of memoirs and reference works were gathered to be used in teaching of students: this was the starting point of the library. Management of the library and the archives was entrusted to Pierre Charles Lesage, who, as soon as he finished his studies at the School, was appointed to the assistant director, Antoine Chezy, to deal with relations with the students. Having become inspector of the School, Lesage wrote the catalogue of the various memoirs on machines, physics, mathematics, experiments, etc. divided by boxes from the letter A to Y for the instruction of pupils, [and] the general inventory of the papers contained in the boxes of the library, which are intended for the instruction of pupils, put in order (...) in 1789.

The Perronet and Lesage legacies

Perronet and Lesage were scholars, men of the Enlightenment who were involved in the great intellectual enterprises of their time, such as the Encyclopedia. Various collections were gathered in their personal cabinets: books, manuscripts, drawings, maps, but also scientific instruments, models, lithology samples, art objects etc. These collections can be accessed upon justified request.

Plan de la maison du Châtelet : salles des maquettes 1796-1807
Plan of the Châtelet house: model rooms 1796-1807

Upon their deaths, in 1794 and 1810 respectively, they bequeathed most of their collections, to the students in the case of Perronet, and to the School in the case of Lesage. Their papers enriched the archives and the library, while their objects formed the basis of what would fill the galleries of the School in the 19th century.

Graphomètre de Lesage
Lesage’s graphometer
Étui de mathématiques de Perronet
Perronet’s mathematics set. Ph. P. Rocca


...to the 19th century collections

From the beginning of the 19th century, the School's collections expanded and continued to grow.  The School benefited from revolutionary seizures of property, receiving numerous works from literary repositories.

The importance of de Prony's role

The ambitious steps taken by the fourth director, Gaspard Riche de Prony, to make the School a high quality educational institution, needed to be backed up by first-class teachers and specialized documentation at the service of the students. The new Ministry of Public Works went even further; it planned to make the School an organization serving the Corps des ponts. It voted increasingly significant budgets allowing, among other things, to buy all the new publications on subjects related to the subjects taught and to the themes of civil engineering. It also systematically sent any document that could be useful to the Corps, emanating from its services or from other ministries, which explains the presence of rare, even unique items (unica), among the works present in the library.

In parallel to these official initiatives, many engineers made donations to the School. They followed the example of the first directors, Prony having also made a considerable donation through his family. When he died, widowed and childless in 1839, his family gave his library to the School, whose importance was such that its classification was still not completed in 1842, as explained by the inspector of the time, Amédée Bommart. Today, a large part of the so-called "Prony" collections are in fact public documents related to the engineer's professional activities, both at the Land Registry and at the School, or as an emissary of Napoleon, particularly in Italy. In 1850, his niece, Madame de Corancez, finally bequeathed a last set of works, apparently less numerous, in her will.

The first catalogs

Page de titre du catalogue
Catalog of books, by Schwebelé, 1872

The library's collections grew exponentially in the second half of the 19th century. While from 1840 to 1850 fewer than 1500 books were added, this number became almost the annual norm for the years 1875-1880. Such a volume meant that catalogs needed to be drawn up. The first came out in 1872, but the rate of expansion of the collection was such that a first supplement had to be produced in record time in 1880-1881. Still under the direction of the inspector, the library was staffed with its own personnel, although they were neither professionals nor scholars, with the notable exception of Abbé Halma at the beginning of the 19th century.

Another catalog devoted to the manuscripts was published in 1886. These manuscripts were made up in part of archives selected by Lesage in the 18th century for their pedagogical interest, a practice that was continued thereafter, but also of various donated or acquired manuscripts.  Their classification by major documentary groups led to a partial dismantling of the original archives, making it rather difficult to understand them today. The other archives were abandoned, along with their historical classification, until 1995, when the first archives department was created, but they suffer from arbitrary eliminations on a few occasions, often for reasons of space or security.

The collections of scientific objects

In contrast to the archives, other collections were the object of much attention during this same period. Among those from the Lesage legacy, are Perronet’s lithology samples. This was the starting point of the geology and mineralogy collection, used by students until the end of the 20th century, of which only a small part remains today. Numerous other samples, which have unfortunately all since disappeared, arrived at the School throughout the 19th century: samples of wood, larvae or wood-eating animals, various building materials, ores, fuels, metals, etc., from the travels or missions of the engineers, exchanges with French or foreign correspondents and industrialists, discoveries and technical advances.

Similarly, when in 1804 Lesage and Ferrat, an engineer in mathematical instruments, finalized the General inventory of mathematical instruments belonging to the School, they described about a hundred instruments, to which were added those from Lesage's bequest. The repository of instruments, under the responsibility of the inspector, provided devices for the students' exercises and lent them to the engineers on the building sites. Acquisitions were oriented towards new inventions that enabled faster and more precise work.

Inventaire instruments mathématiques
Inventory of mathematical instruments

With the great construction projects of the 19th century (canals, railroads, works in Paris, etc.), the need for instruments increased greatly. However, while the School's repository was managed with rigor, this was not the case everywhere in France. In 1849, by decision of the Minister of Public Works, it was transformed into a central repository of all precision instruments belonging to the State for the Ponts et chaussées engineers, Mines and for the colonies. This new direction was only the first in a series that would affect other collections of objects.

The Hôtel de Fleury, where the school moved to in 1845, allowed for expansions that were not possible in the previous premises. The Ponts et chaussées administration was finally able to achieve its unspoken wish to entrust its "flagship" establishment with the management of services and collections of all kinds. The School thus became a sort of "conservatory" of the Public Works trades, providing the necessary equipment to those who needed it, both students and engineers, while continuing to welcome foreign visitors who came to be inspired by French inventions.

The School's repository

Six years later, the School recovered the buildings and land belonging to the former weighbridge workshop located on the Quai de Billy and set up the School's repository. There was a laboratory and experimental workshop, large volume models and collections, the central machinery repository, and examination and meeting rooms for boards and commissions. In the 1870s, the repository was moved to Avenue d'Iéna, while the model gallery was built on Rue des Saint-Pères, next to the School.

Galerie des modèles, détail, 1924. Agence Rol
Model Gallery, detail, 1924. Agence Rol

During the same decades, the innovations and projects presented by the Ministry during the World Fairs were an opportunity for the School to enrich the content of the galleries. Engineers and professors from the school systematically contributed to the choice of the subjects presented and to the organization of the Public Works pavilion, which is why the School was offered some of the exhibits in return. For the 1873 Vienna World's Fair, Honoré Baron, professor of roads at the School, director of the Precision Instruments repository and in charge of supervising the model gallery, wrote and exhibited the Descriptive Catalog of Models, Instruments and Drawings in the School’s galleries.

Catalogue des galeries, par Baron, 1873
Catalog of the galleries, by Baron, 1873

In the introduction, he wrote: “the various collections in the galleries [...] must have originated [...] shortly [...] after the launch of the School itself. […]. Scientific works, drawings, models of machines and works were needed [...]. But, on the one hand, the geographers and draughtsmen [...] used a certain number of instruments which constituted a first collection; on the other hand, Perronet [...] had several models of his machines and of his principal works of art established; he bequeathed them to the School at the same time as his precious library. […]. The collection gathered in the School's galleries is valuable from the perspectives of both the art and the instruction of students; it is also the starting point for the studies and work of new generations”.

This last sentence expresses the preoccupation of management when the new objects arrive, in particular after the universal exhibitions: to constitute a rich "documentation" testifying to the technical progress to be useful to the future generations, and made to last. The trials of the first half of the twentieth century undermined this great enthusiasm.


The 20th century: decline, disappearance and slow rebirth

New collections

From 1914 onwards, the First World War brought the constant growth of the collections to a halt. Paradoxically, just as technical innovations were proliferating during the war and just afterwards, those of the previous period began to decline. Course content was modified after the Great War, and training concentrated more on field work than on the aging encyclopedic collections piled up in the galleries.

On the other hand, new objects testifying to the evolution of technologies appeared in the School's collections. Although photography had been widely used in the training of students since the 1860s, it was in the midst of the war that management began to look at the advantages cinematography could bring to teaching. The Director, Auguste Kleine, was even appointed in 1916 as a member of the extra-parliamentary commission in charge of studying the means to generalize the application of cinema in the different branches of education. This is how films were introduced into the establishment's collections.

A slow decline

The Second World War sounded the final death knell for the 19th century collections. The models, relief plans, paintings and bas-reliefs of the model gallery were destroyed or dispersed in 1954, and the building was demolished, with the aim of erecting a new modern library in its place, which was never built. It must be said that the bulky nature of the large models did them a disservice at a time when space was again at a premium and the notion of scientific heritage had not yet taken hold. As these collections were dispersed, they were judged solely on the basis of their utility.

Démolition de la galerie des modèles, 1954.
Demolition of the model gallery, 1954.

Other objects continued to be abandoned in the 1960s, with the abolition of the instrument department; in the 1980s, it was the geology and mineralogy gallery that was emptied of most of its samples, as well as the lithographic stones used in the 19th century to print the students' portfolios, or the courses.

An awakening since the end of the 20th century

The archives, on the other hand, came back into the limelight with the late creation of a dedicated archive entity, in 1995, within the Center for Contemporary and Historical Documentation. This made it possible to look at bringing all of the School's archives together, including those held at the library, in an overall classification plan that reflects the evolution of the establishment.

Since the 2000s, the dormant collections, for those that still exist, have been gradually finding their way back into the light. By selling the Hôtel de Fleury, its historic address in Paris, in 2008, the School undoubtedly awakened memories buried in the minds of its former students; they rediscover these reminders of their youth with a degree of nostalgia. The youngest students are also curious about a heritage of which they had no idea. They are generally of such interest that the role that these forgotten collections could still play today is easy to imagine; they may prove useful in raising students' awareness of the humanities and social sciences, and will revive the educational and practical vocation they originally had.

maquette du pont de Brunoy, de l'atelier de Perronet, fin du XVIIIIe, après restauration
Model of the bridge in Brunoy, from Perronet’s workshop, end of the 18th century, after restoration