The Transylvanian Diet was the constitutional and political body of Principality of Transylvania, and later of the Grand Principality of Transylvania. It consisted of the three privileged nations (Hungarians, Transylvanian Saxons

Transylvanian Saxons

The Transylvanian Saxons are a people of German ethnicity who settled in Transylvania from the 12th century onwards.The colonization of Transylvania by Germans was begun by King Géza II of Hungary . For decades, the main task of the German settlers was to defend the southeastern border of the...

 and Székelys) belonging to the received religions (Roman Catholic, Lutheran, Reformed and later Unitarian

Unitarian Church of Transylvania

The Unitarian Church of Transylvania is a church of the Unitarian denomination, based in the city of Cluj in the Principality of Transylvania, present day in Romania...

).

The diet sessions at Marosvásárhely (now Târgu Mureş) (20 January 1542) and at Torda

Turda

Turda is a city and Municipality in Cluj County, Romania, situated on the Arieş River.- Ancient times :The city was founded by Dacians under the name Patavissa or Potaissa...

 (now Turda) (2 March 1542) laid the basis for the political and administrative organization of Transylvania

Transylvania

Transylvania is a historical region in the central part of Romania. Bounded on the east and south by the Carpathian mountain range, historical Transylvania extended in the west to the Apuseni Mountains; however, the term sometimes encompasses not only Transylvania proper, but also the historical...

. The diet decided on juridical, military and economic matters. It ceased to exist following the Austro-Hungarian Compromise of 1867.