Wis. Stat. § 757.14: Sittings, public.

The sittings of every court shall be public and every citizen may freely attend the same, including proceedings held by telephone or videoconferencing technology, except if otherwise expressly provided by law. If the content of the proceeding is deemed graphic or obscene, the judge or justice may exclude from the courtroom all minors not present as parties or witnesses. The court may utilize electronic means to allow the public the ability to hear and see, in real time, all proceedings in a manner as similar as practicable to being present in the courtroom.