Commercium

thumb|The head table of a fraternity commercium in Vienna in the early 1950s A commercium (plural commercia) is a traditional academic feast in universities in Central and Northern European countries. In Germany it is called a or . It is organised by student fraternities in Germanic and Baltic countries, as well as Poland.

At a commercium, tables are often placed in the form of a U or a W, and the participants drink beer and sing commercium songs. Strict traditional rules govern this occasion, although it may integrate theatrical and musical aspects. A commercium is the more formal form of the tableround, called in German.