> For the complete documentation index, see [llms.txt](https://docs.census.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.census.de/the-census-database-overview/the-census-data-model.md).

# The Census Data Model

When using the Census Database, it is helpful to have an overview of the different [Object Types ](/navigating-and-searching/examples-of-typical-searches/search-functions/advanced-search/select-object-types-in-advanced-search.md)and how the records are structured.

<figure><img src="https://32133529-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FQXkdVwY1QIoMKRN8Omas%2Fuploads%2FT3zXhxH9x0zc0KUAZIyb%2FScreenshot%202023-10-04%20at%2011.00.38.png?alt=media&amp;token=514d3df6-a05b-41c6-8b8e-8ebb6ce5de3d" alt=""><figcaption></figcaption></figure>

The Census data model is structured according to the relationship between [Antique Monuments](/using-census-data/data-in-the-census-records/antique-monument-records.md) and [Postclassical Works](/using-census-data/data-in-the-census-records/postclassical-work-records.md), the two primary Object Types. Each Antique Monument in the Census database is linked to related Postclassical Works (which can be visual and/or written sources). One can also find Anitque Works related to Postclassical Works, since these links function in both directions.&#x20;

For example, the Pantheon in Rome is linked to, among other things, a text by the architect Andrea Palladio and a floor plan of the rotunda by Alberto Alberti. These two Postclassical Works are also linked back to the Pantheon. Furthermore, if multiple copies of a Postclassical Work or multiple replicas of an ancient object exist, these connections are also represented. For example, the marble statue of *Apollo Belvedere* is put in relation to the presumed bronze original version of the statue.

In addition, Antique Monuments and Postclassical Works are linked to Secondary Object Types: [Bibliography](/using-census-data/data-in-the-census-records/bibliography-records.md), [Person](/using-census-data/data-in-the-census-records/person-records.md), [Style](/using-census-data/data-in-the-census-records/style-records.md), [Period](/using-census-data/data-in-the-census-records/period-records.md), [Location](/using-census-data/data-in-the-census-records/location-records.md), and [Image](/using-census-data/data-in-the-census-records/antique-monument-records/comments/image-records.md). These Secondary Object Types are linked to records in the Primary Object Types. For example, an ancient statue (a record in **Antique Monument**) can be linked to the specific page of an article that mentions it (a record in **Bibliography**), the artist who created it (a record in **Person**), the artistic style to which it can be attributed (a record in **Style**), the time period in which it was created (a record in **Period**), its former locations and present-day location (records in **Location**), as well as one or more images (records in **Image**).&#x20;