# Theme On large sites and applications, it is not unusual to have different themes. There are certainly different ways of dealing with themes but I personally like having them all in a `themes/` folder. *Note — This is very project-specific and is likely to be non-existent on many projects.* Reference: [Sass Guidelines](http://sass-guidelin.es/) > [Architecture](http://sass-guidelin.es/#architecture) > [Themes folder](http://sass-guidelin.es/#themes-folder)