Babel

Facts

c.14th century: Babel outpost construction begins, by peacemaking efforts from the Menthar and Promellia civilizations. The outpost is left incomplete when the diplomatic missions are recalled to the final battle of the Menthar-Promellian War. (ENT Novel: Tower of Babel)
c.18th century: Babel is rediscovered, and following study of its history via the records left behind, is used as the site for the Ramatis Choral Debates. Following this, it begins a reputation as a neutral site for interstellar deiplomatic efforts. (ENT Novel: Tower of Babel)
2154: Planned site of Andorian/Tellarite trade negotiations prior to interference upon a Romulan attack. (ENT: "Babel One", "United")
2164: Site of the Federation/Rigelian negotiations surrounding their petition for Federation membership. (ENT Novel: Tower of Babel)
2267: Site of debates surrounding Coridan's potential admission to the Federation. (TOS: "Journey to Babel")