Called?

Christiania bikes is a brand. Cargo bike is the common term used to describe the class of bicycles or trikes. In Dutch they’re named bakfiets.

[https://en.wikipedia.org/wiki/Cargo_bike](https://en.wikipedia.org/wiki/Cargo_bike)

Edit: bakfiets is a general Dutch term.

To add to what u/fiskfisk says, they are also sometimes called “box bikes” or “front loaders,” or “long Johns,” or: in the case of the two wheels in the front, “cargo trikes,” or “box trikes.” I’d say “bakfiets,” though a brand also, is a generic word, the way Americans use “Kleenex” for “tissue,” though in the case of “bakfiets,” I think it was a generic term first. This is a pretty cool site with a lot of information on their history and names: [https://mechaniccycling.com/blogs/blog/a-visual-history-of-the-cargo-bike](https://mechaniccycling.com/blogs/blog/a-visual-history-of-the-cargo-bike)