Justice League Watchtower

The JLA Watchtower. From JLA #4 (April 1997). Art by Howard Porter.
Notable characters	Justice League of America
First appearance	JLA #4 (April 1997)
Publisher	DC Comics

The Watchtower is the name of various bases used by the Justice League of America in DC Comics and various media. It has been portrayed in DC Comics as a building on Earth's moon, and as a space-station in orbit in the DCAU.

The Watchtower debuted in JLA #4 (April 1997) during Grant Morrison's run on the title. It is constructed of promethium and uses highly advanced Martian, Thanagarian, Kryptonian, and Earth technologies. The arrival of Orion and Big Barda led to the addition of New Genesis and Apokolips technologies.

Areas of the Watchtower were shown in JLA # 16 when super-villain Prometheus made his debut and downloaded the Watchtower blueprints. Among them:

Getting to the Watchtower and around the various areas is facilitated by teleportation tubes placed for easy access in the event of an emergency.

The Watchtower was destroyed by Superboy-Prime in JLA #120, and superseded by The Hall, based on Earth, and Satellite Watchtower in space.

Following the gathering of the new team as seen in Justice League of America (vol.2) # 7 (April 2007), a new satellite is presented as headquarters.

The new satellite is an orbiting Watchtower working together with The Hall, a building located in Washington D.C. funded by Bruce Wayne and designed by Wonder Woman and John Stewart. Inside the Hall is an archway-type teleportation system, dubbed 'Slideways' in which a person merely need to walk through the archway to be transported to the League's new orbiting satellite headquarter 22,300 miles above Earth.