<p>If we visit the campus on our own (not during one of the Princeton Previews), can we sit in on classes? (I couldn't find anything on the website; maybe I didn't look in the right places.)</p>
<p>Yeah, especially lectures. Anyone can just walk in. You’ll find the master course schedule here:</p>
<p>[Course</a> Offerings « Office of the Registrar](<a href=“http://registrar.princeton.edu/course-offerings/]Course”>Course Offerings | Office of the Registrar)</p>