# Adding entities to domains

Copy as Markdown[View as Markdown](/docs/development/guides/domains/entities/adding-entities-to-domains.md)

***

**Added in** `eventcatalog@2.36.0`

Once you have [created your entities](/docs/development/guides/domains/entities/adding-entities.md) you can add them to your domains.

To add an entity to a domain you need to add the entity to the `entities` array in the domain's markdown file.

/domains/Orders/index.mdx

```

---
id: OrderItem
name: OrderItem
version: 1.0.0
entities:
  - id: OrderItem
    version: 1.0.0
---

Your domain markdown...
```