Seran T-1

From Memory Alpha, the free Star Trek reference

Seran T-1 was the designation of a 24th century Federation outpost.

This outpost was the location where the dilithium crystal chamber for the USS Enterprise-D was designed on stardate 40052.

According to Leah Brahms, "some of the Federation's best engineering minds participated in its development." (TNG: "Booby Trap")