In Good Estate
Very rare1.0%ObjectiveOptionalSingle-player
Upgrade your Estate with a lvl 5 Villa and fill all external slots
Needs Roads to Power - it's a construction checklist on your admin-government Estate: villa to level 5 (Grand Estate) and something built in every external slot. Easy mode per the wiki: set the "Extra Administrative Realms - Players" game rule to Always and play the Holy Roman Empire in 1178, which starts with a half-built estate and the income to finish it fast. It also falls out naturally during a Byzantine run - Against the Odds hands you a suitable estate along the way.