Trinoda necessitas

Trinoda necessitas is a very old rule that existed in medieval times (a very long time ago). It was a set of three things that people had to do or have in order to have certain rights and to obey the law.

The first thing was to have a place to live (like a house or land). This was called "terrae datio", which means giving land or property.

The second thing was to have a way to protect yourself and others, like joining the army or building a fence around your property. This was called "armamentaria", which means having weapons or defenses.

The third thing was to use roads or paths that were available to you to travel or trade goods. This was called "iter", which means to travel.

In short, trinoda necessitas was a very important rule that made sure people had a place to live, could protect themselves and others, and could travel safely. It was a way to keep people safe and organized in medieval times.