Courthouses are usually located convenient to prisons and/or guardian keeps. Courtrooms are large open spaces with an elevated bench for the judge(s), a separate seating area for a jury (if there is one), and places for the defendant, the attorneys, witnesses to give testimony, and a gallery for observers. Trials are generally public unless there are compelling special circumstances.
Citizen residents of a location are required to make themselves available to serve on a jury upon demand. Names from the tax rolls or local census lists are drawn at random and guardians dispensed to find and bring in the lucky persons. Once a person serves on a jury, they are given a letter exempting them from having to serve again for five years so that, if their name comes up again before that time, they can show their exemption to the guardians and get off the hook.