This app was developed for visitors to the Cologne light art project "COLLUMINA IV" and is intended to serve as an accompaniment there. In the app, information about artists and locations is offered in a compact form. In addition, access to the website of the site operators is enabled to get a complete picture. The app is multilingual in the current release and supports German and English. The app is multilingual in the current release and supports German and English as well as other language