> For the complete documentation index, see [llms.txt](https://cardano-wiki.gitbook.io/cardano/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cardano-wiki.gitbook.io/cardano/how-does-cardano-work/table-of-contents/three-layers.md).

# Three Layers

The Cardano architecture features three layers: