Here are a few of the laws of the Roman Republic from the Twelve Tables These have been simplified and reworded but hopefully the meanings have not been changed.
If you are called to appear in court you have to go. If you don't you can be arrested and forced to go.
If you need a witness in court and they refuse to go you can stand in front of their house and shout out how they are refusing to do their duty as a citizen. You can do this once every three days.
Should a tree on a neighbor's farm be bent by the wind and lean over onto your farm, you can go to court and get the tree cut down.
If fruit falls from your trees it is yours no matter where it falls.
If you lied in court you would be thrown off of the Tarpeian Rock.
You could not hold a political or business meeting at night. Dinner parties and religious festivals at night were ok.
Everyone who died had to buried or burned outside the city.
Rich people could not marry poor people and vice versa (plebeians and patricians). This law did get changed later.