How did house numbers work in the Czech lands?

An excellent resource for those just getting started in Czech genealogy is the Czech Genealogy for Beginners blog.

Here is a post everybody should read from the site. It answers the following questions about house numbers:

- When did house numbering begin and why?

- How were house numbers first given?

- How did the systems change over time?

- How frequent were house renumberings and how did that work?

- How can I know which house number I'm looking at?