The Mainz Carnival (Mainzer Fastnacht, „Määnzer Fassenacht“ or „Meenzer Fassenacht“) is a months-long citywide carnival celebration in Mainz, Germany that traditionally begins on 11 November but culminates in the days before Ash Wednesday in the spring.
It is one of the largest carnival events in Germany and, along with the Cologne and Düsseldorfer carnivals, Mainz is one of the three cities prominent in the rhenish carnival tradition. Aside from the celebrations, parades, and jollity which are typical of carnival traditions in many countries, the Mainz carnival has an unusual emphasis on political and literary humor and commentary.
The tradition of carnival can be traced back to the Christian moveable feasts, where Ash Wednesday is the first day of Lent and occurs forty-six days (forty days not counting Sundays) before Easter. The first written records of the tradition date from the 13th and 14th century. By that time, regulations against excessive gluttony and during the days before carnival had been established. The word „Fastnacht“ or carnival occurs for the first time during the 13th century. Details about the old Mainz carnival are not thoroughly covered in primary sources. A scripture of the Mainz humanist writer Dietrich Gresemund dated to the end of the 15th century describes carnival as an unorganized Volksfest comprising masquerade, meals, drinking and dancing during day and night. He describes the celebrants engaging in crude jokes or, under the protection of their masks, excessive quarrelling.
Simultaneously, huge carnival celebrations at the electoral court happened, where the roles at the court were rearranged at random. In 1664 the prince elector drew the role of the electoral cabinetmaker, in 1668 he was cup-bearer and had to serve all guests. This habit was called „Mainzer Königreich“ (Mainz kingdom). This roleplaying tradition continued until the last elector, Friedrich Karl Joseph von Erthal, terminated it in 1775.