Rudolf Brun (1290s – 17 September 1360) was the leader of the Zürich guilds' revolution of 1336, and the city's first independent mayor.

According to the new constitution, the council was now composed of 26 members, of whom 13 were of the Konstaffel, consisting of the former patriciate; at least seven of these were required to hold knighthood.

In this sense, Brun's reform was not so much a revolution as the creation of a balance of power between the patriciate and the guilds.

A result of Brun's revolution was a decrease of the influence of the city's two monasteries, the Grossmünster and the Fraumünster, which had dominated Zürich throughout the Middle Ages.

The Fraumünster abbesses, traditionally women of the highest nobility, did retain considerable political influence, however, and the process was only completed with Huldrych Zwingli's reformation in the 1520s, in the course of which the monasteries were shut down.