This website has two main parts

1. A list of links to calendars (not the actual calendar data)
2. A way to show them

The code for the calendar list view is available on Github. This list can look like publicdata.events/amsterdamart or like calendar.sandberg.nl. This code doesn't include the parts to manage the list, like add new lists, manage lists, etc - it's only the view with the list of calendars and their combined calendar view.

The actual list of calendars link is availabe on the overview by clicking "List data"