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Darthen, Seronia quad map

A diagram of Darthen

Darthen was a coastal city on the planet Rekag-Seronia.

A map of the city labeled Seronia Quad N2605 depicted landmarks including a doctor, a Federation consulate with a pizza parlor, A Night at the Opera, and a spaceport.

During the 2360s, Darthen had remained neutral throughout the conflict between the Seronians and the Rekags. The city had loyalists from both sides residing there, and as a compromise it was chosen by Ambassador Ves Alkar for the location of a peace conference between the two in 2369. (TNG: "Man Of The People")

The map displayed on the observation lounge monitor was identified as the coastal city of Darthen in the episode script.
The okudagram map of this city was put up for auction in 2018. [1]