Gertrude is the name of the documentary system used by the regional services of the General Inventory of Cultural Heritage in France. Its public dissemination interface organizes thousands of heritage notices in a tree structure accessible to all. Understanding the logic of its site map allows for quick access to records of buildings, movable objects, or thematic files, without getting lost in a considerable volume of data.
Gertrude as a Heritage Documentary Database: Technical Architecture
Before discussing the site map, it is essential to grasp what Gertrude is as a tool. It is a relational database designed to structure inventory files of cultural heritage. Each notice is defined by standardized fields: municipality, study area, building typology, dating, author, materials.
This standardization is not trivial. It is what makes the hierarchical organization of the site map possible. Without structured fields shared among all regions, it would be impossible to offer coherent navigation from one portal to another.
Since the decentralization of the General Inventory (law of August 13, 2004, relating to local freedoms and responsibilities), each region manages its own Gertrude dissemination instance. The Breton portal patrimoine.bzh, the Occitanie portal at inventaire.patrimoines.laregion.fr, and the Hauts-de-France portal all reflect the same documentary logic, adapted to their territory. By consulting the Madame Gertrude site map, one can find this tree structure that classifies content by major thematic and geographical entries.
Gertrude Site Map: Navigation by Study Area and Typology
The site map of a Gertrude portal does not resemble a classic XML sitemap intended for search engines. It is a functional tree structure designed for documentary research, not for SEO.
The first navigation entry is based on the study area. A study area corresponds to a defined geographical perimeter during an inventory campaign: a municipality, a district, sometimes an intercommunal set. It is the first logical filter for a user looking for heritage in a specific territory.
The second entry is based on the typology of building or object. The typologies follow a controlled vocabulary (thesaurus) specific to the General Inventory. Categories such as “parish church,” “farm,” “mill,” “chapel,” “house,” “wayside cross” can be found. This vocabulary ensures that two notices describing the same type of heritage use exactly the same term, regardless of the region.
Research Themes and Thematic Files
Beyond geography and typology, some portals offer an entry by research theme. A thematic file groups notices of various types around a transversal subject: the seaside architecture of a coast, the houses of religious vestment making, the textile designs of a manufacturer.
These thematic files constitute an additional layer of navigation in the site map. They allow for the cross-referencing of information that, in a strictly geographical or typological tree structure, would remain scattered.
Concrete Usefulness of the Site Map for Different Audiences
The organization of the Gertrude site map does not only serve art history researchers. Several categories of users find structured access to data that would otherwise be difficult to locate.
- Urban planning services of local authorities consult the notices to identify listed buildings before granting work or development permits
- Genealogists and local historians use the entry by municipality to find records of farms, manors, or chapels related to families or regional events
- Teachers and cultural mediators use thematic files to prepare educational pathways rooted in local heritage
For each of these uses, the site map acts as a structured table of contents that avoids relying solely on the internal search engine, which is often limited when one does not know the exact vocabulary of the thesaurus.
Differences Between Regional Gertrude Portals: What the Site Map Reveals
Each region having taken charge of its instance since decentralization, the portals are not all identical. The site map directly reflects these differences.
The Breton portal patrimoine.bzh structures its navigation around files accessible by study area, municipality, and typology. The tree structure is deep: one can reach an individual record in three or four clicks from the site map.
The Occitanie portal adopts a similar logic but incorporates more structured fields visible from the first level of navigation. The notices display the municipality, study area, and dating directly without needing to open the complete record.
In Hauts-de-France, the interface emphasizes geographic map search, which alters the role of the textual site map in the user journey. The cartographic navigation partially replaces the classic tree structure.
What These Variations Imply
A user accustomed to the portal of one region may not find their bearings on another. The site map remains the most reliable entry point to understand how each portal has organized its data. It is also the quickest way to verify if a study area or a given typology has already been the subject of inventory campaigns in the relevant region.
Gertrude Site Map and SEO: Two Distinct Logics
A sitemap in the SEO sense (XML file declared in the robots.txt) lists URLs for indexing robots. The Gertrude site map, however, is an HTML page intended for humans. The two coexist on most portals, but their functions diverge.
The HTML site map of Gertrude is built around a hierarchical documentary logic, not around update frequency or indexing priority. It does not contain priority or lastmod tags. Its role is to make the intellectual organization of the heritage fund readable.
This distinction has a practical consequence: search engines index Gertrude notices, but the most relevant entry point for a human remains the HTML site map, because it restores the documentary context that Google does not show in its results.
For those interested in French cultural heritage, understanding the structure of the Gertrude site map transforms a large database into an accessible research tool. The key lies in the controlled vocabulary and the geographical tree structure: once these two logics are understood, each regional portal becomes navigable in just a few clicks.