For additional meanings of "Requiem", please see Requiem.
Requiem in 3188
Requiem was the main settlement on Hima in the 32nd century. Hovering above it was the building housing the Mercantile. A walkway connected this building to a towering structure which lead to Requiem proper.
In 3188, Michael Burnham visited Requiem when she was looking for a way to connect with her ship, the USS Discovery. She was escorted into the settlement by Cleveland Booker. (DIS: "That Hope Is You, Part 1")