# Parent Themes

The [Override Mechanism](https://docs.scandipwa.com/developing-with-scandi/override-mechanism) is about taking a base parent theme, and overriding parts of it to create a new, customized theme. By default, that parent theme is `@scandipwa/scandipwa`, the standard ScandiPWA theme – but it doesn't have to be!

Any theme created using `create-scandipwa-app` can be extended. Read the [CSA documentation](https://scandipwa.gitbook.io/create-scandipwa-app/themes/extensions-and-themes) to learn more.