Game concept
Yurt Buildings
The game also links it as Yurt Building.
From the game's encyclopedia
Yurt Buildings are unique improvements to the Nomadic Capital.
Mechanically, they are Domicile Buildings — though many represent social customs or simply areas of focus for the Nomad tribe, rather than being literal structures.
The bonuses they can confer include:
• Unlocking Court Positions and Nomadic Decisions and Character Interactions
• Various bonuses to Herd and County Fertility, including Terrain specializations
• Unlocking and improving Nomadic Men-at-Arms and boosting the strength of Nomadic Horde
• Unique nomadic Cultural Tradition bonuses
• Ways to manage your Vassals and Tributaries, as well as influence Characters at your court.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Yurt Buildings is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Yurt Buildings are unique improvements to the Nomadic Capital." It is part of Nomadic Capital. The game also links it as Yurt Building. Patch 1.20.1.2, from game/common/game_concepts/mpo_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/mpo_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.