Denkmal.org is an Oi!-project and aims to serve as an alternative event calendar for your city.
Install the librarian-puppet and landrush plugins for Vagrant:
vagrant plugin install vagrant-librarian-puppet
vagrant plugin install landrush
Start and provision the box:
vagrant up
The website should now be accessible on your host machine at https://denkmal.dev.cargomedia.ch.
The admin interface runs on https://admin-denkmal.dev.cargomedia.ch (login: admin / admin).