---
title: "Site collections"
slug: "site-collections"
abstract: "Use site collections to run multiple sites on a single instance of Sitecore."
---
# Site collections

The SXA content architecture includes site collections and sites. SXA supports multiple site collections, which means that you can run multiple sites on a single instance of Sitecore. Each site collection can include multiple related sites, for example, to support multiple brands for a single company or multiple languages or locations for a single brand.

Learn more about site collections with these topics:

- [Create a headless site collection and site](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/create-a-headless-site-collection-and-site.html)
- [Grouping of headless site collections and sites](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/grouping-of-headless-site-collections-and-sites.html)
- [Share content between headless sites](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/share-content-between-headless-sites.html)
- [Add and extend a template](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/add-and-extend-a-template.html)
- [Add a module to an existing site collection or site](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/add-a-module-to-an-existing-site-collection-or-site-1612175.html)
- [Remove a site collection or a site](https://doc.sitecore.com/sai/en/developers/sitecoreai/content-modeling-and-presentation/sitecoreai-for-developers/content-editor-items/site-collections/remove-a-site-collection-or-a-site.html)