Seats were territorial-administrative units in the medieval Kingdom of Hungary

Kingdom of Hungary

The Kingdom of Hungary comprised present-day Hungary, Slovakia and Croatia , Transylvania , Carpatho Ruthenia , Vojvodina , Burgenland , and other smaller territories surrounding present-day Hungary's borders...

. The seats were autonomous regions within the Kingdom, and were independent from the feudal county system

Comitatus (Kingdom of Hungary)

A county is the name of a type of administrative units in the Kingdom of Hungary and in Hungary from the 10th century until the present day....

. Their autonomy was granted in return for the military services they provided to the Hungarian Kings.

Székler seats' list:

• Marosszék
• Udvarhelyszék
• Csíkszék
• Gyergyószék
• Bardoc-Miklósvárszék
• Sepsiszék
• Orbaiszék
• Kézdiszék

Seats were formed by the:

• Székelys
• 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...
  
  
• Kumans
  Kunság
  Kunság is a historical and geographical region in Hungary situated in the current Bács-Kiskun and Jász-Nagykun-Szolnok counties. Like other historical European regions called Cumania, it is named for the Cumans, a nomadic tribe of pagan Kipchaks that settled the area...
  
  
• Jassic people
  Jassic people
  The Jassic people or Jász are an ethnic group of Hungarians who mostly live in the Jász-Nagykun-Szolnok county of the Republic of Hungary. They are of Ossetic origin and originally spoke the Jassic dialect of the Ossetic language...
  
  
• the Ten Lance Bearers

Most seats gave up their autonomous status and military traditions in late medieval times and paid tax instead.