The capital city of the Klingon Empire on the homeworld Qo'noS, seat of the High Council and site of the Great Hall.
The First City is the capital of the Klingon Empire, located on Qo'noS. It contains the Great Hall, where the High Council sits under the chancellor, and an Old Quarter of dark, narrow streets.
The city is first seen in the third-season Next Generation episode Sins of the Father, in which Worf comes before the council to answer the charge that his father betrayed Khitomer, and Picard seeks out the old nurse Kahlest in the Old Quarter. It returns in Reunion and Redemption, when Gowron is installed as chancellor in the Great Hall and the Duras family's challenge leads to civil war.
Later series come back to it. Deep Space Nine visits the Great Hall in The House of Quark, when Quark and Grilka take their dispute to Gowron, and Enterprise shows an earlier council chamber when Archer returns Klaang in Broken Bow.